A greenhouse is used to protect plants by keeping them warm.
Angiosperms are the flowering plants.
A greenhouse is used to protect angiosperms by keeping them warm.
A greenhouse is used to protect angiosperms how?
Options:
* their hosts
* by keeping them underground
* by keeping them warm
* by keeping them outside
* by keeping them exposed
* Exfoliation
* organisms and their habitat
* In the winter