Which strategy makes use of summarizing to understand written documents? guessing from context, paraphrasing, previewing, skimming

The strategy which makes use of summarizing to understand written documents is PARAPHRASING. 
Paraphrasing is the act of putting an author's words into one's own words. For one to effectively paraphrase, one has to really understand the subject that the author is talking about. Paraphrasing should be done in such a way that the original content of the paraphrased document is preserved.

Select the word from the list that best fits the definitionstates the the universe is expanding

The songs were performed with the singers' eyes closed so they could focus on the words and preserve every detail.