Answer:
3: The document shows the voice of a person who is facing sectional divide and are divided on the the issue of slavery. The slave is asking for the liberation from slavery and want them to be heard. Slave population want the equal rights or privilege as others.
4: It creates tension as it cause riots and the human population can get hurt. The riots can turn into war if there will be no solution of the problem.
According to one major language theory, how did different groups develop their own languages?
Answer: There are two main theories that explain how different groups developed their own languages. The major one is that humans at some point in time evolved a language acquisition device.
I hope it helps, Regards.