Cells of the tissue are living and show angular wall thickening. They also provide mechanical support. The said tissue is .....

Explanation

To solve the question, we need to identify the tissue described based on the characteristics provided:

1. **Living Cells**: The cells of the tissue must be alive, indicating that they contain protoplasm.

2. **Angular Wall Thickening**: The cells exhibit thickening at the angles where the cell walls meet, suggesting a specific type of cell wall structure.

3. **Mechanical Support**: The tissue must provide mechanical support to the plant, indicating that it plays a role in maintaining the plant's structure and strength.

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