Which animal changed the ways in which native americans could interact with their environment

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.

What party formed to limit slavery in the west?

Which option identifies an industrial era secondary source that used photographic evidence to expose the poverty prevalent in urban industrial centers? a. shame of the cities b. the octopus c. how the other half lives d. the dying man