Question

magnets and magnetism quiz complete mr. garcia uses magnets to hold a poster on a steel filing cabinet because a main component of steel is iron. carbon. plastic. glass.

Explanation:

Steel is an alloy primarily composed of iron (along with a small amount of carbon, usually). Magnets attract ferromagnetic materials like iron. Carbon, plastic, and glass are not ferromagnetic and do not interact with magnets in the way needed to hold a poster. So the main component of steel that allows the magnet to work is iron.

Answer:

A. iron