Conductors of electricity:

**The reasoning** A conductor is a material that allows electric current (the flow of electrons) to pass through it easily. Metals like **iron** have free electrons in their atomic structure that can move around freely. When you apply a voltage, these electrons flow from one point to another, creating current. **Iron** (option C) is a metal, so it's packed with these mobile electrons. That's why it conducts electricity brilliantly — think of wires, electrical poles, and metal tools. **Why the wrong options tempt you** Wood, rubber, and plastic are **insulators** — they hold their electrons tightly, preventing flow. The trap? In everyday life, you see plastic coating wires or rubber gloves protecting electricians. You might think "electricity-related = conductor," but actually they're used *because* they **don't** conduct! They keep you safe by blocking the current. **Quick takeaway** **Metals conduct; non-metals (like wood, rubber, plastic) insulate.** If it's shiny and metallic, electrons can dance through it freely!