A greenhouse is used to protect plants by keeping them warm.
Temperatures go from warm to hot.
A greenhouse is used to protect plants by keeping their temperature.
What is used to protect plants by keeping their temperature?
Options:
(1) a white house
(2) energy
(3) an electric stove
(4) a microwave
(5) electricity
(6) a thermometer
(7) exoskeleton
(8) a greenhouse