Answer:
A divided regional identity (with a bit of national unity) developed.
Explanation:
Politics: Some contributed (voting rights) to unity, others (nullification) clearly divided the country.
Economics: Market revolution was a bit of both but Tariffs and the clash between the industrial north and the agricultural south was dividing the country and contributed to a regional identity.
Foreign Policy: The war of 1812 united the country; the westward expansion was uniting and dividing at the same time.
As we take in account that Economics is always the most important thing for the general public, the regional identity grew more than the national unity did.
In Chicago, the sides were extremely segregated. The african american community was strictly on the south side. Redlining would occur to affect african americans abilities to rent or buy homes. Chicago’d basically meant segregating or discriminated against.
I would said the answer is " <span>It allowed for important discoveries such as the circulation of blood through the body" </span>