 A biotic factors the temperature first the contents definition of temperature loss of heat to the environment then gain of heat then effect of habitat requirement then body size and the metabolism relationship. So first the definition of temperature, so temperature is basically a measurement of amount of heat energy present within the body. Temperature basically any body can be any animal or plant or any material can be amount of heat keep resistors measurement. If we talk about the animals, so most of the animals they regulate their body temperature and for this they have to expand their energy, they expand their energy, they extend their energy, they utilize their energy for maintaining the body temperature. So the temperature it has many effects on the body of animals, but the most important effect of temperature on animals is the temperature it directly effects the metabolism, the metabolism effect of the cell to make the body to be effect. So how temperature is lost between the animal and the environment, the animal's body set heat or temperature, how it loses, how it loses from the body, the different mechanisms, four basic patterns through which the body can lose. The first one is the conduction, conduction is called by touch, loss of heat by touch. If our body is hot, if we touch an object of cold, then the heat from our body will be transferred to that cold object. This pattern by which the heat is transferred by touching, by touching or by massing or attaching something, it is called the conduction process. Convection, the transfer heat through waves, when the heat is transferred in the form of water, it is also called the convection method. So if through waves, like the liquid waves of water or the air waves, when the heat is transferred through it, then it is called the convection process. Radiations, electromagnetic radiation or solar radiation is simply called, through solar radiation, the heat reaches our body, even from the sun, the heat reaches the body, it reaches by the process of radiations, it reaches through radiations, so radiations have a solar radiation or through other radiations when the heat reaches the body, then it goes out of the body, even from our body, the infrared radiation releases the heat. So because here the heat is losing, so the heat loss means that our body, when it is having energy, heat energy is present, so this heat energy is released from the body by the process of infrared radiations, infrared radiation is released from the body. It is a simple example, if you see, if you are in the heat, a person walks out of the heat, so if you are standing next to him, he says, I am feeling hot, what is the reason for this? The reason for this is that when he is coming out of the heat, there is a lot of heat energy in his body. So now, as soon as he comes out of the heat, he reaches somewhere near you, so from his body, infrared radiation is coming towards you, so by which you are feeling warm, this is the reason why you feel hot or feel hot. Evaporation, by evaporation, the heat is lost to the environment in the form of water vapors, so water vapors through, what is it called, the heat loss from the body, like perspiration, after perspiration, after sweating, we feel cold, why? Because when perspiration comes, the water vapors evaporate, so what is the other reason? The body that is in the heat, it also goes along, so our body temperature decreases. How does the heat gain? The heat gain is almost the same mechanism that is present in the body. Through radiation, our body gains heat, or as many animals as you know, reptiles, they are cold-bred animals. They do not maintain the normal temperature, so reptiles, when they are cold days or when they are low temperature, they do sunbasking. They sit in front of the sun, because of which, when the sun is shining on their body, their body will warm up, this is what many insects do. So this, through radiation, the body is gaining heat, this is a mechanism to gain heat, conduction. If there is a reptile, where there is a lizard, where there is a stick, if it goes on such a rock, which was in front of the sun for a long time, then when it is hot, when it sits on it, what will happen to its body? The heat will enter its body ultimately. This is the method of conduction. So if you observe, the animals that live in deserts, if they are on an extreme, midday, they have to go out for reptiles, for food, they usually lift their legs from their ground. They do not touch their body with sand. The reason is that sand is very hot. So if you touch the body with hot sand, then the heat will enter its body through conduction, and its body temperature will be very high. That is why they raise their body upwards, so that the heat cannot be transferred by conduction. Heat is also produced during metabolism. During metabolism, a lot of heat is produced. This heat is used in the body temperature regulation, and a lot of such heat dissipates out in the environment. So how the thermoregulatory properties affect the animals? If we look at the animals, how does the temperature affect the habitat requirement? When the temperature is present in the temperature fluctuation, then availability of food, availability of water, availability of shelter also affects it. If the temperature is supposed to be very high, then the food will not be available at a high temperature. It will be available at a moderate temperature. Similarly, if the temperature is present in the water, then the humidity and water will be present at a moderate temperature. Similarly, shelter. So the environmental condition of the temperature also affects the shelter of the animals.