Fact 1: Agreenhouse is used to protect plants by keeping them warm.

Fact 2: Another well known plant is the Mesquite Bush.

Given the two facts above, answer the question "What can a greenhouse protect by keeping warm?" with the following options: 
- mussels
 - Species
 - organisms
 - lights
 - bushes
 - rocks
 - Oak
 - hats


 

     bushes    