Fact 1: Plants exhibit phototropism, or growing toward a light source.

Fact 2: First, the sun is a brilliant source of white light.

Given the two facts above, answer the question "What behavior do plants exhibit that makes them grow towards the sun?" with the following options: 
- phototropism
 - Exfoliation
 - photography
 - peachleaf willow
 - chlorophyll
 - Chemical energy
 - direct energy
 - chloroplasts


 

 phototropism        