The presence of which magnetic feature best explains why a magnet can act at a distance on other magnets or on objects containing certain metals?

Magnetic fields.

Explanation:

Hello,

The presence of a magnetic fields best explains why a permanent magnet can act on another magnetic objects when are separated by a certain distance. There exist magnetic field lines which are emanated from the north pole to the south pole whose path is curved. Now, take into account that the longer the distance between the objects, the lower the magnetic field or force.

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