Fact 1: Pollination requires pollinators.

Fact 2: Most plants are either insect pollinated or wind pollinated.

Given the two facts above, answer the question "What requires either insects or wind." with the following options: 
- Pollen grains
 - swamp vegetation
 - animals
 - earth
 - Animal survival
 - bloom time
 - Most plants
 - nature


 

       Most plants  