The boundaries of the earth's plates where earth quakes tends to occur are known as _____ zones.

Explanation

**Step-by-Step Solution:**

1. **Understanding Earth's Plates**: The Earth's surface is made up of large sections called tectonic plates. These plates float on the semi-fluid layer of the mantle beneath them.

2. **Movement of Tectonic Plates**: Tectonic plates are constantly moving, albeit very slowly. Their movement can lead to interactions at their boundaries.

3. **Interactions at Boundaries**: When tectonic plates interact at their boundaries, they can either collide, pull apart, or slide past one another. These interactions can cause stress to build up.

...