Fact 1: An automobile engine transforms chemical energy into mechanical energy.

Fact 2: Marine engines, with very few exceptions, are automobile engines converted to marine use.

Given the two facts above, answer the question "What converts chemical energy into mechanical energy?" with the following options: 
- kinetic energy
 - Marine engine
 - driving
 - some invertebrates
 - sea urchins
 - vehicles
 - rockets
 - animal transport


 

  Marine engine       