Give an instance to show that plants respond to stimuli.

Explanation

### Step-by-Step Solution:

1. **Understanding Plant Responses**: Plants respond to various stimuli in their environment. This response is known as "tropism," which is a growth movement toward or away from a stimulus.

2. **Types of Tropism**: There are several types of tropism based on the type of stimulus:
- **Phototropism**: Response to light.
- **Geotropism**: Response to gravity.
- **Thigmotropism**: Response to touch.
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