A group of animals which are related by descent and share many similarities are referred to as

Options

A. Breed
B. race
C. Variety
D. Species

Explanation

To solve the question, we will follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about a group of animals that are related by descent and share many similarities.

2. **Defining Key Terms**:
- **Breed**: A breed is a group of animals that share common characteristics and are related by descent. They often have similar physical traits, behaviors, and genetic makeup.
- **Species**: A species is a broader classification that includes groups of individuals that can interbreed and produce fertile offspring.
- **Variety**: A variety is a subset of a species that is genetically distinct and may be geographically isolated from other populations within that species.

3. **Analyzing the Options**:
- The question specifies that the group of animals is related by descent and shares many similarities, which aligns with the definition of a breed.
- The other terms (species and variety) do not fit the description as closely as breed does.

4. **Conclusion**: Based on the definitions and analysis, the correct answer to the question is "breed".

### Final Answer:
A group of animals which are related by descent and share many similarities are referred to as a **breed**.

---