.......... gives green colour to the leaves.

Options

A. Plastids
B. Chlorophyll
C. Vacuoles
D. None of these

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the substance that gives green color to the leaves.

2. **Analyzing the Options**: We need to evaluate the provided options to identify which one is responsible for the green color in leaves.

3. **Evaluating Each Option**:
- **Option 1: Plastids**: Plastids are organelles in plant cells that can store substances. However, they are not specifically responsible for the green color.
- **Option 2: Chlorophyll**: Chlorophyll is a green pigment found in the chloroplasts of plant cells. It is specifically responsible for the green color of leaves and plays a crucial role in photosynthesis.
- **Option 3: Vacuole**: Vacuoles are storage organelles that help maintain water balance in plant cells, but they do not contribute to the green color of leaves.
- **Option 4: None of these**: This option implies that none of the previous options are correct, which is not true in this case.

4. **Identifying the Correct Answer**: After evaluating all the options, it is clear that **chlorophyll** is the correct answer as it is the pigment that gives leaves their green color.

5. **Conclusion**: Therefore, the substance that gives green color to the leaves is **chlorophyll**.

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