Respuesta :
People must have moved to the cities like New York and Pittsburgh as they had the desire to live near the coast. Also, during the civil war, it was easier for people to relocate themselves to better and safer places away from riots that might take place during the civil war.
We can sum this up by saying that -
The above-mentioned cities are laid down to the northeastern American parts.
During the civil war, north America was considered to be a place with wider business opportunities, as foreign trade would have increased
New York was an important street at the stock exchange as it had NASDAQ. Migration was easier from coastal cities.
For finding better big opportunities desire to live near the coastal parts of America, people moved to cities like NEW YORK AND PITTSBURGH.
To know more about the civil war that took place globally, refer to the link below:
https://brainly.com/question/515156