Fact 1: Pollination is the fertilization step in the sexual reproduction of plants.

Fact 2: Bees are absolutely essential for pollination.

Given the two facts above, answer the question "What step are bees essential in during the sexual reproduction of plants?" with the following options: 
- pre-flowering
 - death
 - fertilization
 - Energy.
 - food and shelter
 - hydration
 - Animal survival
 - survival


 

   fertilization      