You are presented with the question "What things have positive impact on plants?" and the following answer choices: 
- pollution
 - wind and animals
 - hormones
 - shockwaves
 - food and shelter
 - organic molecules
 - hydrogen and oxygen
 - granuloma

Now knowing that seed dispersal has a positive impact on a plant and seeds are dispersed by the winds and by animals, choose the best answer.


 

  wind and animals       