You are presented with the question "what are the major crop that needs protecting by keeping them warm" and the following answer choices: 
- our planet
 - organisms
 - Earthworms
 - Flowers
 - Echinoids
 - toughness
 - support
 - cellulose

Now knowing that agreenhouse is used to protect plants by keeping them warm and flowers are the major greenhouse crops, choose the best answer.


 

    Flowers     