Question

remember that magnetic field i mentioned—the area around a magnet where the magnetic force exists? it’s strongest at the magnet’s ends, which we call blank.
options: poles, lodestones, magnetisms

Explanation:

In the context of magnets, the ends where the magnetic force is strongest are called poles (north and south poles). Lodestones are natural magnets, and "magnetisms" is an incorrect term here as the question refers to the parts of the magnet, so "poles" is the correct answer.

Answer:

A. poles