Geothermal energy, where we use the heat from deep under the earth to generate electricity, is renewable, that is, there is so much of it that we can keep using it practically forever.

Some geothermal plants may over time use up all the heat in that particular location. The power plant may have to be shut down for a few years till the heat renews from deep in the earth.

Renewable for as long as the world spins and the earth's core remains liquid and in motion.

Yes

renewable

it is used here to heat and cool homes by digging up the yard and laying pipe that leads to the home

it uses the heat and coolness of the underground instead of having electric or gas or oil heat/ac

Non!