Animals living and subsisting on other animals come under

Options

A. Pathology
B. Parasitology
C. Parazoology
D. Protozoology.

Answer

To solve the question "Animals living and subsisting on other animals come under," we will analyze the options provided and determine the correct answer step by step.

### Step-by-Step Solution:

1. **Understand the Question**: The question is asking about animals that live on or depend on other animals for their survival. These animals are known as parasites.

2. **Identify Key Terms**:
- **Parasite**: An organism that lives on or in a host organism and gets its food at the expense of its host.
- **Host**: The organism that provides the habitat and food for the parasite.

3. **Analyze the Options**:
- **Pathology**: This is the study of diseases and their effects on the body. It does not specifically relate to animals living on other animals.
- **Parasitology**: This is the study of parasites, including their biology, behavior, and interactions with their hosts. This directly relates to the question.
- **Parazoology**: This is a branch of zoology that studies parazoa, which are simple multicellular organisms. It does not pertain to parasites.
- **Protozoology**: This is the study of protozoa, which are single-celled organisms. This is also not related to the question about animals living on other animals.

4. **Select the Correct Answer**: Based on the analysis, the correct answer is **Parasitology** (Option B), as it specifically deals with the study of parasites that live on or in other animals.

### Final Answer:
The correct answer is **B. Parasitology**.

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