One who gets food and other things on the cost of other is called

Options

A. Parasite
B. Commensal
C. Saprophyte
D. Insectivorous

Explanation

To answer the question "One who gets food and other things on the cost of others is called," we need to analyze the options provided: parasite, commensal, saprophyte, and insectivorous.

### Step-by-Step Solution:

1. **Understanding the Options**:
- **Insectivorous**: This term refers to organisms that primarily eat insects. It does not imply taking resources at the cost of others.
- **Saprophyte**: These are organisms, such as fungi and bacteria, that decompose dead and decaying organic matter. They obtain nutrients from dead material, not from living hosts.
- **Commensal**: This term describes a relationship where one organism benefits while the other is neither helped nor harmed. This does not fit the description of taking resources at the cost of another.
- **Parasite**: A parasite is an organism that lives on or in a host and gets its food at the expense of the host. This is a clear example of one organism benefiting at the cost of another.

2. **Identifying the Correct Answer**:
- Based on the definitions, the correct answer is **parasite**. A parasite derives nourishment and other benefits from a host organism, often harming it in the process.

3. **Conclusion**:
- Therefore, the answer to the question is **parasite**.