Answer: D - geographic isolation
Explanation:
The answer is the second one: Many Mongolians are pastoral nomads who raise livestock for a living.
Answer: 1 m
Explanation:
It is simply the size of a wave, measured from one peak to the next. If one imagines a sound wave as something like a water wave, then the wavelength is simply the distance from the crest of the one wave to the next nearest crest. Thus, if the distance between two peaks is 1m, then the wavelength is 1 m.
If we all shared the same culture the world would be the same there would be no war or differences because we are all the same so there is no conflict and we will all believe in the same thing.