You are presented with the question "How do behaviors that improve fitness increase?" and the following answer choices: 
- because of Darwin
 - competition
 - due to fertilization
 - due to asexual reproduction
 - through evolution
 - the body's largest organ
 - Earth orbiting the Sun
 - Riding a bike

Now knowing that behaviors that improve fitness increase through natural selection and natural selection is the mechanism of evolution, choose the best answer.


 

     through evolution    