It is the opinion of the court that the act of congress which prohibited a citizen from holding and owning [enslaved persons] in the territory of the united states north of the line therein mentioned is not warranted by the constitution and is therefore void.”— from dred scott v. sandford
what impact did the dred scott decision have on the u. s.?

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 !