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

Fact 2: Flowers are the major greenhouse crops.

Given the two facts above, answer the question "what are the major crop that needs protecting by keeping them warm" with the following options: 
- our planet
 - organisms
 - Earthworms
 - Flowers
 - Echinoids
 - toughness
 - support
 - cellulose


 

    Flowers     