Is geothermal a non-renewable resource

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.

Strictly speaking geothermal energy is not renewable as we can't grow or make new energy sources to replace it. It is however essentially inexhaustible as it is renewed by processes like radioactive decay and tidal friction in the magma.

It is not 'renewable' if you mean "can humanity restore it?", as it must with trees, for example. It is not so much a renewable energy source as it is a persistent energy source.

It is self-renewing - the Earth is constantly giving off its heat to water which is close enough to the heat to be warmed by it. It is not diminished to any noticeable extent by our using it.

It's capacity is effectively unlimited.
It is renewable.
Yes.