Movement of chloroplast due to cytoplasmic streaming can be observed in

Answer

### Step-by-Step Solution:

1. **Understanding Cytoplasmic Streaming**:
- Cytoplasmic streaming, also known as protoplasmic streaming, is the movement of the cytoplasm within a cell. This process facilitates the transport of nutrients, proteins, and organelles throughout the cell.

2. **Identifying Organisms**:
- Cytoplasmic streaming is observed in both plant and animal cells. However, it is particularly prominent in certain plant cells where movement is necessary for efficient functioning.

3. **Examples of Cytoplasmic Streaming**:
- One of the notable examples of cytoplasmic streaming in plants is in the leaf cells of *Hydrilla*, a type of aquatic plant. In these cells, chloroplasts (the organelles responsible for photosynthesis) move within the cytoplasm due to cytoplasmic streaming.

4. **Conclusion**:
- Therefore, the movement of chloroplasts due to cytoplasmic streaming can be observed in *Hydrilla* leaves.

### Final Answer:
The movement of chloroplasts due to cytoplasmic streaming can be observed in *Hydrilla* leaves.