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

Options

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

Explanation

To solve the question, "Cells of this tissue are living and show angular wall thickening. They also provide mechanical support. The tissue is," we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Characteristics of the Tissue**:
The question states that the cells of the tissue are living and have angular wall thickening. Additionally, the tissue provides mechanical support.

2. **Analyze the Options**:
- **Xylem**: This is a type of vascular tissue primarily responsible for the transport of water and minerals. It consists of dead cells and does not provide angular wall thickening.
- **Sclerenchyma**: This is a type of ground tissue that provides mechanical support but is composed of dead cells. It does not fit the criteria of being living.
- **Collenchyma**: This is a type of ground tissue that consists of living cells with unevenly thickened walls, often angular in shape. It provides mechanical support, especially in young stems and leaves.
- **Epidermis**: This is the outermost layer of cells in plants, primarily serving protective functions and does not provide mechanical support in the way described.

3. **Select the Correct Answer**:
Based on the characteristics provided in the question, the tissue that is living, shows angular wall thickening, and provides mechanical support is **Collenchyma**.

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

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