Expansion of a leaf is an example of

Options

A. Nutation
B. Nastic movement
C. Ephemeral movement
D. Paratonic movement.

Answer

To determine the correct answer to the question "Expansion of a leaf is an example of," we will analyze the given options step by step.

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the type of movement that corresponds to the expansion of a leaf.

2. **Analyze the Options**:
- **Option 1: Nutation**: This refers to the bending movements of plant parts, often in a circular or spiral pattern. It can involve the growth and expansion of leaves as they orient themselves towards light or other stimuli.
- **Option 2: Gnostic Movements**: These are movements in response to a specific stimulus, such as the folding of leaves in a sensitive plant when touched. This does not relate directly to the expansion of leaves.
- **Option 3: Ephemeral Movements**: These movements are related to the growth patterns of leaves and flowers but are not specifically about the expansion of leaves.
- **Option 4: Paratonic Movements**: These are also movements in response to stimuli, similar to Gnostic movements, and do not pertain to the expansion of leaves.

3. **Identify the Best Fit**: Among the options, Nutation is the most relevant as it involves the bending and growth of leaves, which can include their expansion as they grow and orient themselves.

4. **Conclusion**: Therefore, the best answer to the question is **Nutation**.

### Final Answer:
The expansion of a leaf is an example of **Nutation**.

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