The first and the third can be key factors in the structure of a biological community; that is, all the populations of organisms livingtogether and potentially interacting in a particular area.
I guess living on campus I'll have a chance to have a closer circle of friends since we'll be livingtogether.
我想校内住宿会有机会交更多的朋友，毕竟大家都住在一起。
3
Fazio's Indiana study found that three times as many randomly assigned interracial roommates were no longer livingtogether at the end of the semester, compared with white roommates.