Avocados was contributed by the spanish or the aztecs

i thinl it is the 1st answer

explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

hope this .

plz give me brainliest!

can you tell me all of statements so i can answer this for you.

until then have a great week.

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