I would say that the answer should be "Helen's challenges with the frustration of learning to communicate".as a blind-deaf person and the excellent analogy with being shrouded in fog and not having how to determine where she was headed but love giving her the light to find her way and eventually get a degree at university.
#1) How are they similar to "the slaves of political parties"?
Answer: Slaves wanted to be trusted by their overseers because this often would grant them privileges that other slaves did not have.
#2) Why does Douglass make this comparison?
Answer: Slaves would seek with great care to please their overseers to gain their trust, just as office-seekers in the political parties seek to please and deceive the people.
I hope it helps, Regards.
I would say what type of work you do. It shows what the person is interested in and what the work they do and will be doing is going to look like. It also opens up information about who they are.
The fisherman and his wife without the quotations