Answer:
mountain systems and fresh water
Explanation:
mountain systems are a group of mountain ranges with similarity in form, structure, and alignment that have arisen from the same cause, usually an orogeny. Take the Himalayan mountains for example.
Fresh waters are natural occurring waters except seawater and brackish water. for example they have lake Baikal,the Yangtze river etc.
The distance between each pair of points.
(-4, 6) and (three, -7) is (7, 9)
(-6,-5) and (2.0) is (8, 5)
Distance is a numerical measurement of how long way aside items or points are. In physics or regular utilization, the distance may additionally discuss with a bodily period or an estimation based on different criteria. the distance from point A to a degree B is now and again denoted as |AB|. the extent or amount of space among matters, points, strains, and so on. the nation or truth of being apart in space, as of 1 issue from every other; remoteness. a linear volume of space: Seven miles is a distance too incredible to stroll in an hour.
Distance between points is the period of the line segment that connects the two given points. Distance between two factors in coordinate geometry may be calculated by using finding the length of the road phase joining the given coordinates.
The distance of an object can be defined as the entire direction traveled by using an item. for example. if a car travels east for five km and takes a flip to travel north for every other eight km, the whole distance traveled via car shall be 13 km.
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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).