Climax is the term used to refer to the section of story or play in which the tension or action reaches its peak. Sometimes in the story the climax is a point of "crisis." The climax is defined by the high point, and from there the story's action begins to fall before problems are resolved.
Paraphrasing involves putting a passage from source material into your own words. ... Summarizing involves putting the main idea(s) into your own words, including only the main point(s).