Question

which factor decided whether the animal is cold blooded or warm blooded

Answer 1

Please mark my answer as brainliest These terms are just for the name, this doesn't mean that their blood is actually warm and cold.  The animals which can regulate their body temperature are said to be warm blooded animals, like mammals and birds. The regulate their temperature through processes like perspiration and all.  The animals whose body temperature is dependent on the surroundings, like reptiles, and some mammals. Please mark my answer as brainliest

Answer 2

The main deciding factor in this scenario is whether the internal body temperature of an animal is constant throughout the year despite of external environmental changes (warm blooded animal) or the internal body temperature changes as the external environmental changes occur (cold blooded animal).  

As examples, all kind of mammals are warm-blooded while amphibians and reptiles are cold-blooded animals.