Most ____ are ectothermic, absorbing external heat as the main source of body heat.

زیادہ تر ____ ایکٹوتھرمک ہیں، جو جسم کی حرارت کے بنیادی ذریعہ کے طور پر بیرونی حرارت کو جذب کرتے ہیں۔

Fishes

Reptiles

Amphibians

None of these

Answer: Reptiles

Reptiles are mostly ectothermic,

It means they rely on external heat sources to regulate their body temperature.

This is in contrast to endothermic animals, which generate their own heat internally.