During the process of seed germination, it is observed that seedlings grow towards the source of light. The phenomenon exhibited by seedlings is known as

Options

A. gravitropism
B. phototropism
C. chemotropism
D. thermotropism

Answer

To answer the question "During the process of seed germination, it is observed that seedlings grow towards the source of light. The phenomenon exhibited by seedlings is known as," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the phenomenon that occurs when seedlings grow towards light during germination.

2. **Identifying Key Terms**: The key terms in the question are "seedlings," "grow towards," and "source of light."

3. **Exploring the Options**: The options provided are:
- Gravitropism
- Phototropism
- Chemotropism
- Thermotropism

4. **Defining Each Term**:
- **Gravitropism**: Growth response to gravity (roots grow downwards).
- **Phototropism**: Growth response to light (plants grow towards light).
- **Chemotropism**: Growth response to chemicals.
- **Thermotropism**: Growth response to temperature.

5. **Analyzing the Phenomenon**: Since the question specifically mentions seedlings growing towards light, we can eliminate Gravitropism, Chemotropism, and Thermotropism.

6. **Concluding the Answer**: The correct answer is **Phototropism**, which is the phenomenon where plants or seedlings grow towards the light source.

### Final Answer:
The phenomenon exhibited by seedlings growing towards the source of light is known as **Phototropism**.

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