I think that this is what you're looking for but I'm not sure:
<span>Kingdom: Animalia<span>
</span>Phylum: Chordata<span>
</span>Subphylum: <span>Vertebrata</span><span>
</span>Class: <span>Mammalia</span><span>
</span>Subclass: Theria<span>
</span>Infraclass: <span>Eutheria</span><span>
</span>Order: <span>Primates</span><span>
</span>Suborder: <span>Anthropoidea</span><span>
</span>Superfamily: Hominoidea<span>
</span>Family: Hominidae<span>
</span>Genus: <span>Homo
</span>Species: <span>sapiens</span></span>
Drives deep ocean currents
It is important to understand because it's the way all cells reproduce (except sperm and egg cells, they do meiosis), and our cells are the essential parts of our whole being.
Answer:
It's not C or D because the Crust is actaully around 36km thick so that means it's eitehr A or B and the crust is mostly made form granite so Ima say B is the answer