No they cant be mechanical because then something would have to generate their rays through the inventing of a machine.
C, it has to be. it doesnt look like much else
The difference between extrusive and intrusive rocks are how they cool
down. Extrusive rocks cool down quickly and are created by lava; because
of this they have very small, fine-grained crystals. Intrusive rocks
cool slowly beneath the surface of the earth and are created by magma;
because the cooling process is very slow the rocks have very large
crystals.
<span>Archaea. hope that helps you out</span>
