What is the name of the first chinese dynasty?

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 was an important consequence of the neolithic revolution? ):

What happened in the tinker v des monies? and why is it important what happened in the hazlewood v. kuhlmeier? why is it important?