As railroads grew:
O A. Suburbs closed their train stations.
OB. Suburbs began to disappear.
O C. People began to travel farther from their homes.
O D. People stayed closer to home.

C. People began to travel farther from their homes

Explanation:

Bc railroads make traveling easier, it would make sense that people would travel farther away from their home as railroads grew

idk lol i just wanna finish mines

biological/genetic factors means they were born or predisposed to have something. nothing can really change it, and you can't really do much to "fix" it. it isn't something learned

these are the biological factors:

adrian is relatively tall and he is on the basketball team

(adrian can't ever stop being tall or force himself to be tall. likely one or both of his parents are tall as well and they passed on the tall gene. he probably does basketball because he is tall)

the rest are environmental/cultural factors. these are things that are taught to us. for example, cynthia wasn't born saving pocket money, her family most likely taught her this (environmental factor)

hope this !