You are presented with the question "an animal requires what by the body for survival" and the following answer choices: 
- stamina
 - heat energy
 - energy adaptors
 - heat produced
 - glycogen
 - chemical messengers
 - heat eaters
 - cool breeze

Now knowing that an animal requires warmth for survival and heat is produced to maintain warmth in the boy, choose the best answer.


 

    heat produced     