These currents are on the oceans surface and in its depths, flowing both locally and globally.
It's closeness im pretty sure
C
Given that the World population changed little between this time, we can gather than the birth and death rates were similar, since they seem to cancel each other out from 1200-1400. To clarify, think of this. If you add something to a total (think births to population), but take away the same number (think deaths from population) you end up with the same total as before. Because of this, A is the correct answer choice (The birth rate and death rate were about equal).
Answer:
it lets you visually see where a place is exactly instead of on a piece of paper and you can see the whole world at once and keep a mental image
