Fact 1: When an animal moves , chemical energy is converted to mechanical energy.

Fact 2: Humans are a new type of animal.

Given the two facts above, answer the question "what moves by converting chemical energy into mechanical energy?" with the following options: 
- omnivores
 - humans
 - Lobsters
 - wind
 - particles
 - pigeons
 - Mammal
 - motion pictures


 

  humans       