1. Free Charge Carriers: These are particles that can move freely within the material. In metals, these are electrons. In electrolytes, these are ions (both positive and negative).

2. A Material with a Conductive Property: This means the material must allow the free charge carriers to move easily through it.

Let me explain further:

* Free Charge Carriers: Conduction is essentially the flow of electric charge. For this flow to occur, there must be particles that are not bound to specific locations and can move in response to an electric field.

* Conductive Material: The material itself must have a structure that allows these charge carriers to move freely. In metals, the electrons are loosely bound to the atoms and can easily drift through the material. In electrolytes, the ions are dissolved in a solution and can move freely.

Examples:

* Metals: Copper wire is a good conductor because it has many free electrons that can move easily.

* Electrolytes: Saltwater is a good conductor because it contains dissolved ions that can carry charge.

Contrast:

* Insulators: Materials like rubber or glass are insulators because their electrons are tightly bound to the atoms and cannot move freely. This prevents them from conducting electricity.