37. An insulator of electricity is defined as a material that (A) produces electric current. (B) increases the flow of current. (C) allows current to pass through it easily. (D) prevents current from passing through it.

The correct answer is (D) prevents current from passing through it.<br /><br />An insulator of electricity is a material that resists the flow of electric current. It has a high electrical resistance, which means that it does not allow electric charge to move through it easily. Insulators are used to prevent the unintended flow of electricity and to protect against electric shocks. Examples of insulating materials include rubber, glass, plastic, and wood.