Fact 1: Along tail can be used to move through water by an animal.

Fact 2: All thresher sharks have tail fins nearly as long as the rest of the body.

Given the two facts above, answer the question "Fins nearly as long as what can be used to move through water?" with the following options: 
- most cephalopods
 - the rest of the body
 - animals with backbones
 - the eye of a needle
 - an organism's body
 - increases a body's strength
 - the body of water
 - the body of space


 

  the rest of the body       