Animal G is warm blooded like mammals and birds. Their body temperature is maintained even when there is an increase in external temperature.

Animal H is cold blooded like reptiles. There body temperature increase or decrease depends on the external temperature.

Animal G survives in hot sorroundings but transpiration. That is by sweat cool the internal body temperature. The process that takes place is called transpiration.

When there is a decrease in external temperature, animal G increases metabolic rate to generate heat, shivering movements, vasoconstriction