What do you think may be the cause of an earthquake ?

Explanation

### Step-by-Step Solution:

1. **Understanding Earthquake Causes**:
- Earthquakes are primarily caused by the sudden release of energy in the Earth's crust. This energy release occurs due to the movement of tectonic plates.

2. **Tectonic Plates and Faults**:
- The Earth's crust is divided into large sections known as tectonic plates. These plates are constantly moving, albeit very slowly. When they move, they can get stuck at their edges due to friction. Over time, stress builds up in the rocks along these faults.

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