It is C the mantle becauce the crust is the where we live I think of it as the crust of a sandwhich and the core it the center of the earth
<span>C.megalopolis It consists of several large cities and suburbs that adjoin each other. L.A , San Diego and other cities adjoin each other. Hope this helps </span>
B; As far as the relation between humans and the environment, it is obvious how much they relied on it. Not only as a food source, but for economic growth and sustainability as well. The other answers make valid points but in the context of this question, the only one that even mentions the relation is B.
They are brought from colder regions e.g. the North and South poles where ice caps are melting to give cold water. Currents are due to the effect of wind on the water.
I want to say Los Angeles.