Here's why:

* Structure: Paper is made up of cellulose fibers, which are long chains of sugar molecules. These molecules are held together by strong covalent bonds.

* Electron Flow: The electrons in these molecules are tightly bound and don't easily move from one molecule to another. This means paper resists the flow of electricity.

* Practical Examples: Paper is used in electrical applications like insulation in wires and capacitors.

However, there are some nuances:

* Moisture: If paper gets wet, it can become a better conductor of electricity. Water molecules can break the bonds between cellulose molecules, allowing electrons to flow more easily.

* Type of Paper: Some specialized types of paper, like conductive paper, can be made conductive by adding materials like carbon or metallic particles.

In summary: While paper is generally an insulator, its conductivity can be affected by factors like moisture and the presence of conductive materials.