New breeds in domestic dogs are developed by :

Options

A. Sexual selection
B. Natural selection
C. Youth selection
D. Artificial selection

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks how new breeds of domestic dogs are developed. This involves identifying the process or method used in breeding.

2. **Identifying the Options**: The options provided are:
- A) Sexual selection
- B) Natural selection
- C) Youth selection
- D) Artificial selection

3. **Analyzing the Options**:
- **Sexual Selection**: This is a natural process where individuals select mates based on certain traits. While it can influence traits in a population, it is not a method used by humans to create new breeds.
- **Natural Selection**: This is the process where organisms better adapted to their environment tend to survive and produce more offspring. While it plays a role in evolution, it is not a deliberate method used by humans for breeding.
- **Youth Selection**: This term is not commonly recognized in the context of breeding and does not apply here.
- **Artificial Selection**: This is a process where humans intentionally breed animals or plants for specific traits. It is the method used to develop new breeds of domestic dogs by selecting for desired phenotypic traits.

4. **Conclusion**: Based on the analysis, the correct answer is **D) Artificial selection**. This method allows humans to create new breeds of domestic dogs by selecting for specific traits that they desire.

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