An example of a natural magnet is.

Options

A. bar magnet
B. horse-shoe magnet
C. lodestone
D. electromagnets

Answer

To answer the question "An example of a natural magnet is," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Natural Magnets**:
- Natural magnets are materials that have magnetic properties without any human intervention. They occur naturally in the environment.

2. **Identify Common Types of Magnets**:
- There are two main categories of magnets: natural magnets and artificial magnets.
- Artificial magnets include bar magnets, horseshoe magnets, and electromagnets.

3. **Consider Examples of Natural Magnets**:
- The most well-known example of a natural magnet is lodestone, which is a naturally magnetized piece of the mineral magnetite.

4. **Evaluate the Options**:
- If given options, we would look for lodestone among them. Other options like bar magnets, horseshoe magnets, and electromagnets would be classified as artificial magnets.

5. **Conclude with the Correct Answer**:
- Therefore, the answer to the question is that an example of a natural magnet is lodestone.

### Final Answer:
An example of a natural magnet is **lodestone**.