Here's why:

* Insulators are materials that resist the flow of electricity. This resistance arises because the electrons in insulators are tightly bound to their atoms, making it difficult for them to move freely.

* Conductors, on the other hand, allow electrons to flow easily, making them good conductors of electricity.

Examples of Insulators:

* Rubber

* Glass

* Plastic

* Wood

* Air

Let me know if you have more questions!