The movement of sunflower in accordance with the path of sun is due to

Options

A. phototropism
B. geotropism
C. chemotropism
D. hydrotropism

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the movement of sunflowers in relation to the path of the sun. This movement is a response to an external stimulus.

2. **Identifying the Type of Movement**: The movement of plants in response to light is known as phototropism. The prefix "photo-" refers to light, while "-tropism" indicates movement or growth towards or away from a stimulus.

3. **Explaining Phototropism**: In phototropism, plants grow towards the light source. This is particularly evident in sunflowers, which are known to follow the sun's path throughout the day.

4. **Considering Other Tropisms**:
- **Geotropism**: Movement in response to gravity (roots grow downwards).
- **Chemotropism**: Movement in response to chemicals (roots may grow towards nutrients).
- **Hydrotropism**: Movement in response to water (roots grow towards moisture).

5. **Conclusion**: Since the question specifically refers to the movement of sunflowers towards sunlight, the correct answer is phototropism.

6. **Final Answer**: The movement of sunflower in accordance with the path of the sun is due to phototropism.