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

Fact 2: Rhizobial bacteria convert atmospheric nitrogen into nitrate fertilizers in a form usable by plants.

Given the two facts above, answer the question "What does rhizobial bacteria do for plants?" with the following options: 
- Converts oxygen
 - nutrients
 - Converts h2o
 - Converts nitrogen
 - Regrows it
 - hydrate their cells
 - Converts methane
 - competing for resources


 

    Converts nitrogen     