Here's why:

* Plate Movement: The Earth's tectonic plates are constantly moving, albeit very slowly. They can move towards each other (convergent boundaries), away from each other (divergent boundaries), or slide past each other (transform boundaries).

* Stress and Strain: The movement of these plates creates stress and strain along their boundaries. This built-up energy needs to be released, and earthquakes are the result of that sudden release.

* Types of Boundaries:

* Convergent Boundaries: Where plates collide, one plate often subducts (sinks) beneath the other. This generates immense friction and pressure, leading to powerful earthquakes.

* Divergent Boundaries: Where plates pull apart, new crust is created. While less frequent than convergent boundaries, earthquakes can still occur as the plates move and adjust.

* Transform Boundaries: Where plates slide past each other horizontally, the friction caused by the grinding motion creates earthquakes.

So, the meeting points of tectonic plates, known as plate boundaries, are the primary locations for earthquake activity.