Iron filings sprinkled over a magnet define the gravitational field of the magnet.

This is a true statement , as it tells more about the magnetic field strength of the magnetic intensity

Explanation:

Since iron is a ferromagnetic material, a magnetic field induces each particle to become a tiny bar magnet. The south pole of each particle then attracts the north poles of its neighbors, and this process repeated over a wide area creates chains of filings parallel to the direction of the magnetic field.

What is a magnet?

A magnet is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, and attracts or repels other magnets.

the answer would be c. motion and direction

i hope this : )