For humans, population density is the number of people per unit of area, usually quoted per square kilometer or square mile (which may include or exclude, for example, areas of water or glaciers). Commonly this may be calculated for a county, city, country, another territory or the entire world.
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your answer is Swahili aka C
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True, one the earliest human civilizations in the the history settled along the Indus Rives and as a matter of fact, it was called the Indus Valley Civilization and today it is know as India. The indus valley civilization very advanced in technology. They have many things that we recently invented or developed
I can’t see the options, can you take an image and show us so we can answer your question?