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

Fact 2: Plants are very easily raised from seed, sown in a cold greenhouse from February to April.

Given the two facts above, answer the question "What does a greenhouse protect plants from to help them grow easily?" with the following options: 
- death
 - hotness
 - Winter
 - fronts
 - heat
 - drought
 - rain
 - chill


 

        chill 