Questões de Verbos frasais | Phrasal verbs (Inglês)

In the context presented in the article, the highlighted phrasal verb “settle in” (l. 24) means:

Considering the previous text, its ideas and linguistic features, as well as the reading strategies that apply to it, judge the following item.

In both the excerpts “has a history going back to the 15th century”, and “have a history going back to repatriation”, the expression “going back” works as a phrasal verb. 

In the sentence “When broken down into the five major elements, reading instruction is a much more approachable and easily understood skill.”, what does the phrasal verb broken down mean?

Identify the sentence where the choice of phrasal verb conveys the closest meaning to "resolve an issue":

After months of struggling, he finally __________ learning the guitar and focused on piano instead.