Question

to conduct electricity, a substance must contain which of the following?
select the correct answer below:
ions
metallic wires
water
freely mobile charged particles

Explanation:

For a substance to conduct electricity, it must have charged particles that can move freely. Ions are one type of charged particle, but the most general and correct requirement is freely mobile charged particles. Metallic wires are a conductor but are a specific example, not the general requirement. Water (pure water) does not conduct well on its own. The key concept in electrical conduction is the presence of freely mobile charged particles that can carry an electric current.

Answer:

freely mobile charged particles