The correct answer to this open question is the following.
The question is incomplete. Indeed, there is no reference to your previous answer. However, by reading the answers attached we can say that the topic is the Industrial Revolution in the United States. So all those answers can be valid because that is what happened at that time.
People that lived in rural American moved to larger cities such as New York or Chicago, where the big industries and factories were located. Those fabrics were offering plenty of jobs, although those were low-paid jobs. Immigrants came to the United States looking for better conditions for their families and they were hired in the factories. There was a negative side to all of this. Immigrants and poor people worked under unhealthy conditions in places with no ventilation. To make things worse, they lived in crowded spaces in poor neighborhoods, where the risk of disease spread was major.
Sparta was ruled by two kings, who ruled until they died or were forced out of office. Athens was ruled by archons, who were elected annually. Thus, because both parts of Athens' government had leaders who were elected, Athens is said to have been the birthplace of democracy. Spartan life was simple.
<u>Different stones symbolized the diversity and unity of all states.</u>
This is the answer because Lincoln wanted to keep the US unified.
The answer to your question is a