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There are three major compositional groups of igneous rocks, mafic, felsic, and intermediate.
Mafic
The mafic igneous rocks are rich in magnesium and iron, making them a portmaneau of magnesium and ferric. They tend to be with dark coloration, with biotite and olivine being one of those rocks.
Felsic
The feslic igneous rocks are rich in elements that are forming the feldspar and quartz. Their coloration is lighter, and they come in numerous colors, with the granite and quartz being one of them.
Intermediate
The intermediate igneous rocks are in a way transitional rocks between the mafic and the felsic ones. They have a mixture of both mafic and felsic minerlas. Their coloration varies, and the andesite and dacite are some of them.
<span>The correct answer is letter C. Abyssal Plain. Sediment tends to build up in the abyssal plain. Abyssal plain covered more than 50% of the Earth's water surface. It is an underwater plain on the deep ocean floor, located around 3000 to 6000 meter down below.</span>
