Name the plant tissue found in the husk of a coconut and also identify the substance which is responsible for its stiffness.

Explanation

**Step-by-Step Solution:**

1. **Identify the Plant Tissue in Coconut Husk:**
- The plant tissue found in the husk of a coconut is called **sclerenchyma**. This tissue is characterized by its hardness and is composed of dead cells.

2. **Understand the Characteristics of Sclerenchyma:**
- Sclerenchyma tissue is known for providing strength and rigidity to the plant. It is typically found in parts of the plant that require support and protection.

...