What is geothermal energy ?

Explanation

**Step-by-Step Solution:**

1. **Definition of Geothermal Energy**: Geothermal energy is defined as the heat energy that is derived from the Earth's interior. This energy is primarily obtained in the form of steam.

2. **Source of Geothermal Energy**: The steam is generated from hot water that is found beneath the Earth's crust. This hot water is heated due to the geothermal gradient, which is the increase in temperature with depth below the Earth's surface.

3. **Hotspots**: There are specific locations on Earth known as geothermal hotspots. These are areas where the heat from the Earth's interior is particularly close to the surface, allowing for the natural boiling of water.

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