Why parenchyma is called a simple tissue?

Explanation

### Step-by-Step Solution:

1. **Definition of Parenchyma**: Parenchyma is a type of tissue found in plants that is primarily responsible for various functions such as storage, photosynthesis, and tissue repair.

2. **Simple Tissue Explanation**: Parenchyma is classified as a simple tissue because it is composed of only one type of cell. This uniformity in cell type distinguishes it from complex tissues, which consist of multiple cell types.

3. **Cell Structure**: The cells in parenchyma are characterized by their thin walls, which consist of primary and sometimes secondary cell walls. This structure allows for flexibility and the ability to store various substances.

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