Match the folowing animals with the way the regulate there body temperatures?

1. mammals
a-endotherm
b-ectotherm

2. fish
a-endotherm
b-ectotherm

The answers are:
1 - A
2 - B

Ectotherms (cold-blooded animals) are organisms that cannot maintain their body temperature. Their body temperature depends on environmental conditions. The example is fish.
Endotherms (warm-blooded animals) are able to maintain body temperature. Their body temperature does not depend on changes in environmental conditions. The example is mammal.