You are presented with the question "what moves by converting chemical energy into mechanical energy?" and the following answer choices: 
- omnivores
 - humans
 - Lobsters
 - wind
 - particles
 - pigeons
 - Mammal
 - motion pictures

Now knowing that when an animal moves , chemical energy is converted to mechanical energy and humans are a new type of animal, choose the best answer.


 

  humans       