Fact 1: Behaviors that improve fitness increase through natural selection.

Fact 2: Adaptation is the result of natural selection.

Given the two facts above, answer the question "Behaviors that improve fitness increase through what?" with the following options: 
- evolving
 - relocating
 - absorbing
 - competition
 - Riding a bike
 - Animal survival
 - kinetic energy
 - adaptation


 

        adaptation 