Matter is anything that has mass and takes up space. And matter is a physical substance in general, as distinct from mind and spirit; (in physics) that which occupies space and possesses rest mass, especially as distinct from energy.
Work Step by Step
It affects every aspect because everything (living or nonliving) is made of matter (anything that has mass and takes up space). Gravity also applies to it, all mater has mass, but not all masses are matter.