Magnetite, fe3o4, is a ferrimagnetic, rather than a ferromagnetic material that contains different iron isotopes. how is it different from ferromagnetic minerals?
a) it has opposing magnetic moments.
b) it can be spontaneously magnetized.
c) its magnetization is temperature dependent.
d) the electrons in the iron spin in the same direction.

Option A

Explanation:

Ferromagnetic materials have the property to be attracted to magnets while ferrimagnetic material is the magnetic property of materials having atomic moments aligned in opposite directions. In ferrimagnetic material as the magnetic moments are aligned in opposite direction, they cancel out the magnetic field.

A. It has opposing magnetic moments.

Explanation:

Magnetite , Fe3O4 is Ferrimagnetic and quite different from Ferromagnetic minerals because it's magnetic moments are aligned in opposite directions.

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the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).