The conclusion can be drawn from the map about farming by early humans is It occurred primarily in northern parts of the world. Thus the correct answer is D.
What is a map?
A map is a visual depiction of certain features of a location, typically created on a smooth surface. Maps provide information about the globe in an easy-to-understand and visual format.
Agriculture in the earliest civilizations was driven by the Neolithic Revolution. It was the period in human history when people began to stay permanently in one location and build the first civilizations.
They developed farming practices and discovered how to make use of river flooding to create fertile soil and raise crops.
Therefore, option D is appropriate.
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