Which substance can be used to make electrical wires?

Options

A. Copper
B. Rubber
C. Plastic
D. Glass

Answer

To determine which substance can be used to make electrical wires, we will analyze the given options: copper, rubber, plastic, and glass.

### Step-by-Step Solution:

1. **Identify the Purpose of Electrical Wires**:
- Electrical wires are used to conduct electricity. Therefore, the material used for making wires should be a good conductor of electricity.

2. **Analyze Each Option**:
- **Copper**:
- Copper is a metal and is known to be an excellent conductor of electricity. It allows electric current to flow easily through it.
- **Rubber**:
- Rubber is an insulator, meaning it does not allow electricity to flow through it. It is used to coat wires to prevent electric shock.
- **Plastic**:
- Plastic is also an insulator. Like rubber, it does not conduct electricity and is often used for insulation around wires.
- **Glass**:
- Glass is another insulator. It does not allow electricity to pass through it, making it unsuitable for use as a wire.

3. **Conclusion**:
- Among the options provided, **copper** is the only substance that can be used to make electrical wires because it is a conductor of electricity.

### Final Answer:
**Copper** is the substance that can be used to make electrical wires.

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