Cells of this tissue are living and show angular wall thickenings. They also provide mechanical support. The tissue is

Options

A. xylem
B. sclerenchyma
C. collenchyma
D. epidermis.

Answer

**Step-by-Step Solution:**

1. **Identify the Characteristics of the Tissue:**
- The question states that the cells of the tissue are living.
- The tissue shows angular wall thickenings.
- It provides mechanical support to the plant.

2. **Analyze the Options Given:**
- **Xylem:** This is a vascular tissue involved in the transportation of water and minerals. It consists of dead cells when mature, so it does not fit the criteria of being living.
- **Sclerenchyma:** This tissue is also dead at maturity and provides support, but it does not have living cells, hence it does not match the description.
- **Collenchyma:** This tissue is composed of living cells and is characterized by angular wall thickenings. It provides mechanical support to the plant.
- **Epidermis:** This is the outer protective layer of the plant and does not primarily provide mechanical support.

3. **Conclusion:**
- Based on the analysis, the tissue that is living, shows angular wall thickenings, and provides mechanical support is **Collenchyma**.

**Final Answer:**
The tissue is **Collenchyma**.

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