Plants exhibit phototropism, or growing toward a light source, and light comes from the sun. Given these facts, what is plant's tendency to grow toward the sun called among the following options:
- photomorphism
 - phototropism
 - photosynthesis
 - peachleaf willow
 - Conifers
 - Exfoliation
 - vegetation
 - photochromic


 

  phototropism       