Ram visited Manikaran Sahib in Himachal Pradesh where he saw an experimental geothermal plant. When he saw a hot spring,he wanted to know more about it. His father explained to him about geothermal energy and hot springs. Now answer the following questions:
$(a)$ What did Ram's father explain to him about hot springs?
$(b)$ Why is geothermal energy not generated on a large scale?
$(c)$ What is the main advantage of using geothermal energy?

(N/A) Ram's father explained that hot springs are formed when hot underground water finds an outlet at the surface and emerges from the earth.
$(b)$ Geothermal energy is not generated on a large scale because there are very few commercially viable sites where geothermal energy can be effectively exploited.
$(c)$ The main advantage of using geothermal energy is that it is a non-conventional,renewable source of energy that can be harnessed continuously for $24$ hours throughout the year.