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With the _____ of people from fertile areas, knowledge of agriculture spread by _____.


Amigration; diffusion
Brelocation; mail
Ccapture; force
Dreturn; circulation

Verified Answer :

With the A. migration of people from fertile areas, knowledge of agriculture spread by diffusion.
When people migrate from a place, they move into other areas. When something diffuses, it spreads around. 

Answer:

A. migration; diffusion

Explanation: