What happens when two moving plates of earth's crust collide head on with each other ?

Explanation

**Step-by-Step Solution:**

1. **Understanding Earth's Crust and Tectonic Plates:**
- The Earth's crust is composed of several large and small tectonic plates that float on the semi-fluid layer of the mantle beneath them. These plates are constantly in motion due to convection currents in the mantle.

2. **Collision of Tectonic Plates:**
- When two tectonic plates move towards each other, they can collide head-on. This is known as a convergent boundary.

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