Answer: A). Geothermal power plants use the renewable resource of heat from within the Earth to generate electricity.
Explanation:
Geothermal energy is the energy which is obtain in the form of heat liberated from water released from the earth geosphere. The hot mantle causes the boiling of the groundwater which is liberated from the hot spring. It is a renewable source of energy which means it is obtained from resource which can be replenished and can be used again. This energy is used to generate electricity.
According to Newton's 3rd law of motion, every action has an equal and opposite reaction.
So Wall must apply a force of 50 Newton but in opposite direction.
Hope you got it :-D
