The process of mating between closely related individuals is

Options

A. Self breeding
B. Inbreeding
C. Hybridisation
D. Heterosis

Answer

To answer the question "The process of mating between closely related individuals is," we will analyze the options provided and determine the correct one step by step.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the term that describes the mating process between closely related individuals. This is a key concept in genetics and breeding.

2. **Evaluating the Options**:
- **Option 1: Self-breeding**: This refers to the fertilization of the male and female gametes from the same plant. This process does not specifically denote mating between closely related individuals; rather, it is a form of reproduction within a single organism. Therefore, this option is incorrect.

- **Option 2: Inbreeding**: Inbreeding is defined as the mating of individuals that are closely related, such as those from the same variety or breed. This option fits the description provided in the question, making it a strong candidate for the correct answer.

- **Option 3: Hybridization**: This term refers to the crossing of two different species or varieties, resulting in offspring that are hybrids. Since this involves unrelated individuals, it does not match the question's requirement. Thus, this option is incorrect.

- **Option 4: Heterosis**: Heterosis refers to the phenomenon where hybrid offspring exhibit superior qualities compared to their parents. This term does not describe the mating process itself, making it irrelevant to the question.

3. **Conclusion**: After evaluating all the options, the correct answer is **Option 2: Inbreeding**, as it specifically refers to the mating of closely related individuals.

### Final Answer:
The process of mating between closely related individuals is called **Inbreeding**.