What is desertification ? Name one human activity which may lead to desertification .

Explanation

**Step-by-Step Solution:**

1. **Definition of Desertification:**
- Desertification refers to the process of land degradation in arid, semi-arid, and dry sub-humid areas, resulting in the loss of biological productivity. This occurs when the land becomes increasingly dry and loses its vegetation, water, and wildlife.

2. **Impact of Desertification:**
- As desertification progresses, the affected area experiences a decline in soil fertility, which leads to reduced agricultural productivity. The vegetation cover diminishes, and the ecosystem becomes less diverse, ultimately threatening wildlife.

...