The map shows North America’s transportation and railway system in 1887. The expansion of the North American railway and transportation system in the second half of the nineteenth century

resulted in an increase in both international and domestic trade of goods and services throughout the United States.
was solely the product of government planning and investment.
led to increased competition in a variety of industrial markets due to reduced barriers to trade.
was the result of high levels of foreign financial investment from Asian governments wishing to trade in the United States.

i think that the answer is polishing peanuts

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 !