Frogs release their gametes in water because they reproduce through ________ fertilization.

Options

A. External
B. Internal
C. Both (a) and (b)
D. Bisexual

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks why frogs release their gametes in water and what type of fertilization they undergo.

2. **Identifying Gamete Release**: Frogs release their gametes (sperm and eggs) into the water. This is a key detail because it indicates the environment in which fertilization occurs.

3. **Types of Fertilization**:
- **Internal Fertilization**: This occurs when fertilization happens inside the female's body.
- **External Fertilization**: This occurs when the gametes are released into the environment (like water) and fertilization happens outside the body.

4. **Analyzing the Options**:
- Option A: External fertilization
- Option B: Internal fertilization
- Option C: Both A and B
- Option D: Bisexual

5. **Determining the Correct Answer**: Since frogs release their gametes into the water, they undergo external fertilization. Internal fertilization cannot be the answer because that would require the fertilization to happen inside the female body. Therefore, the correct answer is **A, external fertilization**.

6. **Conclusion**: Frogs reproduce through external fertilization, which is why they release their gametes in water.

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