Agreenhouse is used to protect plants by keeping them warm, and energy from the sun keeps the earth warm, enables plants to grow. Given these facts, greenhouses are used to what, using the energy from the sun among the following options:
- heat skin
 - evaporation
 - protect plants
 - cool air
 - spread flower seeds
 - important habitats
 - food and shelter
 - reserve water


 

   protect plants      