Fact 1: Bacteria in soil convert atmospheric nitrogen into a form usable by plants.

Fact 2: Bamboos are among the most useful of all plants.

Given the two facts above, answer the question "Bacteria in soil convert atmospheric nitrogen into a form usable by what?" with the following options: 
- Conifers
 - food
 - rocks
 - humans
 - ice
 - bacteria
 - sharks
 - bamboo


 

        bamboo 