The correct answer is - Watershed.
The drainage basis are places in which all the water in an area is accumulated and ends up in the same place. The drainage systems are divided by highlands, which can vary from small hills to very high mountains, depending on the topography of the place.
The line on the highland that is separating the drainage systems is called watershed. The watershed is simply a line stretching on the highest parts of a highland, thus having a slope on each side.
Answer:
I'd say all of the above because no particular group is more fit than the other for sexual reproduction, if the question was who would have the quickest reproductive rate then you could base that off of population size of X race.
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Picture if there was a pole that went through The middle of the earth verticaly. The tilt it slightly to its side. That is how the earth would rotate, on the pole.
I am sorry if this does not make any sense. I hope I explained it well enough.
The correct answer is - In most Latin American countries, the majority of locals speak Spanish.
Most of the countries in South America have Spanish as their official language, but it is not just the language that is a trait that connects people, it is also the influence of the Spanish culture as well, even in the few countries where it is not a dominant language.