Does electricity move through a conductor or an insulator?

Answer 1

The answer is a little more complex than a neat, pat answer. Electric flow may be seen as forward propagation of electrons, or backwards propagation of positive "holes" which may move through or around a medium, or as the movement of ions through a medium. Depending on the dielectric strength of an insulator, and the voltage/amperage of the charge in question, the electricity may move through, over, or around an insulator.
In some cases, an electric current can move easily through both an insulator and a conductor, but in most cases, electricity moves easiest through a conductor. Conductors are usually metals or metalloids that have are joined together through metallic bonding. Metallic bonding results in positive metal ions floating in a sea of electrons. The "delocalized nature" of the electrons (electrons spread out) allows charge to flow easily through a conductor.

Answer 2

Electricity moves through a conductor, such as metals, which allow the flow of electrons. Insulators, such as rubber or plastic, do not allow the flow of electrons and prevent electricity from moving through them.

Answer 3

Conductor