What is a tropic movement? Explain with an example.

Explanation

### Step-by-Step Solution:

1. **Definition of Tropic Movement**:
- Tropic movement refers to the directional growth or movement of a plant in response to an external stimulus. This movement can be towards (positive tropism) or away from (negative tropism) the stimulus.

2. **Types of Stimuli**:
- The stimuli that can cause tropic movements include light (phototropism), gravity (geotropism), water (hydrotropism), and touch (thigmotropism).

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