What natural boundary separated british territory from louisiana

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.

The low and midlevel clouds that look like cotton balls are

Which of the following cultures were among the earliest known inhabitants of north america? a) mayab) incac) anasazi d) olmec