Which culture first developed an understanding of the concept of zero
a) olmec
b)maya
c)aztec
d)mexica

The photograph shows children in germany after wwi. the photograph was most likely taken to show?

Which of the following is an example of the pull factor known as economic migration? a. better educational opportunities pulling people towards a new country b. mexican laborers entering the us to work in agricultural jobs c. joining family members that are already in a new country d. crop failures driving people away from their country i am unsure on this question, i was thinking b? but i could be wrong.

Identify they difference in plant domestication between mesopotamia and mesoamerica during the neolithic revolution