Thigmonastic movement is found in

Options

A. Albizzia
B. Oxalis
C. Drosera
D. Nepenthes.

Answer

### Step-by-Step Solution:

1. **Understanding Thigmonastic Movement**:
- Thigmonastic movement is a type of gnastic movement in plants that occurs in response to stimuli such as touch or vibration. It is characterized by a non-directional response to the stimulus.

2. **Identifying Examples of Thigmonastic Movement**:
- Common examples of plants that exhibit thigmonastic movement include the leaflets of Mimosa pudica, which fold when touched, and the anthers of certain flowers that respond to the landing of pollinators.

3. **Analyzing the Options**:
- The question provides four options: Albizia, Oxalis, Drosera, and Nepenthes.
- **Albizia**: Known to exhibit thigmonastic movement.
- **Oxalis**: Exhibits photonastic movement, which is a response to light, not touch.
- **Drosera**: Known for haptonastic movement, which is a response to touch but not classified as thigmonastic.
- **Nepenthes**: Does not exhibit thigmonastic movement.

4. **Selecting the Correct Answer**:
- Based on the analysis, the only plant that shows thigmonastic movement from the given options is **Albizia**.

5. **Conclusion**:
- Therefore, the correct answer to the question "Thigmonastic movement is found in" is **Albizia**.