________ is a mode of reproduction in which only one parent is involved.

Options

A. Asexual reproduction
B. Sexual reproduction
C. Internal fertilization
D. Bisexual

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a mode of reproduction that involves only one parent. This means we are looking for a type of reproduction that does not require a male and female partner.

2. **Identifying the Options**: The options given are:
- A) Asexual reproduction
- B) Sexual reproduction
- C) Internal fertilization
- D) Bisexual

3. **Analyzing Each Option**:
- **Asexual Reproduction**: This type of reproduction involves only one parent. It can occur through methods like budding, fission, or fragmentation, where offspring are produced without the involvement of gametes from another parent.
- **Sexual Reproduction**: This mode requires two parents (male and female) and involves the fusion of gametes (sperm and egg). Therefore, this option is not correct.
- **Internal Fertilization**: This refers to the process where fertilization occurs inside the female body, which also requires both male and female gametes. Hence, this option is incorrect.
- **Bisexual**: This term refers to organisms that have both male and female reproductive organs. It implies the involvement of two parents in reproduction, making this option incorrect as well.

4. **Conclusion**: After analyzing all the options, the only mode of reproduction that involves only one parent is **Asexual Reproduction**.

5. **Final Answer**: Therefore, the correct answer is **Asexual Reproduction**.

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