Which kind of clause modifies adjectives, verbs, or adverbs?

The answer is an adverb clause. The adverb clause can modify adverbs, adjectives by telling when, where how or what., depending under what situation. Often time adverb clauses would have subordinating conjunctions and also has a subject and a predicate

the maximum speed limit is 55 mph on a two-lane undivided highway and for vehicles towing trailers.

        its hard for some people to get along and that’s the case for douglass and canot. most of the time when people do not agree with each other its because they have different presperctives, and that is the case here.

captain canot was never a slave so but he was a slaver and a slave ship captain and just like the slave master's he tought it was it was totally normal, he used captain conot is a cruel man who enjoys whipping slaves but never   got whipped he saw it has a destiny for the slave to be a slave and the slaver to be a slaver   but douglass has suffered whoppings cut   even for no reason sometimes. douglass believed that slavery was not natural to black people, they need to study and learn how to read and write. he knew they have rights.

it was really not the captain’s fault he was just brainwashed by the system and when your brainwashed by the system its hard not to be brainwashed. but the reason douglass wants this is because he has suffered he knows how it feels and will do anything to stop that.