You are presented with the question "What behavior do plants exhibit that makes them grow towards the sun?" and the following answer choices: 
- phototropism
 - Exfoliation
 - photography
 - peachleaf willow
 - chlorophyll
 - Chemical energy
 - direct energy
 - chloroplasts

Now knowing that plants exhibit phototropism, or growing toward a light source and first, the sun is a brilliant source of white light, choose the best answer.


 

 phototropism        