Fact 1: Mammals generate heat mainly by keeping their metabolic rate high.

Fact 2: All dolphins are mammals and all mammals breathe air.

Given the two facts above, answer the question "What is the result of a dolphin keeping a high metabolism rate?" with the following options: 
- generate blood cells
 - generate heat
 - overheating
 - develop cancer
 - kinetic energy
 - aerobic capacity
 - exercise
 - Energy.


 

  generate heat       