Explanation:

Warm-blooded creatures, like mammals and birds, try to keep the inside of their bodies at a constant temperature.
They do this by generating their own heat when they are in a cooler environment, and by cooling themselves when they are in a hotter environment.
To generate heat, warm-blooded animals convert the food that they eat into energy. They have to eat a lot of food, compared with cold-blooded animals, to maintain a constant body temperature.
Only a small amount of the food that a warm-blooded animal eats is converted into body mass. The rest is used to fuel a constant body temperature.
Justification: Cold-blooded animals are much more active in warm environments and are very sluggish in cold environments.
This is because their muscle activity depends on chemical reactions which run quickly when it is hot and slowly when it is cold.
A cold-blooded animal can convert much more of its food into body mass compared with a warm-blooded animal.
A cold-blooded animal's level of activity depends upon the temperature of its surroundings. A reptile, for example, will increase its body temperature before hunting and is better able to escape predators when it is warm. Cold-blooded animals also need to be warm and active to find a mate and reproduce.
Being cold-blooded, however, also has its advantages. Cold-blooded animals require much less energy to survive than warm-blooded animals do.
Mammals and birds require much more food and energy than do cold-blooded animals of the same weight. This is because in warm-blooded animals, the heat loss from their bodies is proportional to the surface area of their bodies, while the heat created by their bodies is proportional to their mass