Fact 1: Agreenhouse is used to protect plants from the cold.

Fact 2: Blizzards are heavy snows, very cold temperatures and high winds.

Given the two facts above, answer the question "What protects plants from blizzards?" with the following options: 
- exoskeleton
 - rats
 - greenhouses
 - horses
 - The atmosphere
 - peachleaf willow
 - Blankets
 - dogs


 

   greenhouses      