This is a group of words that states the main thought of a sentence and is complete within itself.

answer:

i believe it's an independent clause.

an independent clause is a clause that can stand by itself as a simple sentence. an independent clause contains a subject and a predicate and makes sense by itself. independent clauses can be joined by using a semicolon or by using a comma followed by a coordinating conjunction.

explanation:

two factors or characteristics of a chapter that might make it difficult to read would be words i don't understand, or if i don't fully understand what's going on in the chapter. strategies i can use to get through the difficult material would be a dictionary, and re-reading previous chapters to get a better grasp of what the author is trying to say.