1. When you place a magnet near the thumbtacks and needles, the thumbtacks and needles begin to move in the direction of the magnet
until they are attracted to it. Why does this happen?

A. The magnet's opposite poles are attracted to each other.

B. The magnet has the same properties to the thumbtacks and
needles.

C. The magnet, thumbtacks and needles' metallic properties made
them repel.

D. Magnetic force causes the magnet's attraction to iron-
containing materials.

REWARD:BRAINLIEST ​