Give the role of the following:
Collenchyma

Explanation

### Step-by-Step Solution:

1. **Definition of Collenchyma**: Collenchyma is a type of simple tissue in plants, which means it is composed of similar types of cells.

2. **Location**: Collenchyma is primarily found beneath the epidermis (the outer layer) of young stems and petioles (the stalk that attaches a leaf to the stem) in dicotyledonous plants.

3. **Cell Structure**: The cells of collenchyma have thickened cell walls, particularly at the corners. This thickening is due to the deposition of substances such as cellulose, hemicellulose, and pectin.

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