engages the reader
teaches the reader something useful (a new way of thinking about the essay in question)
helps the reader to see the bigger picture that the summarized essay is a part of, and
helps you as the writer to gain a deeper understanding of the issues and arguments of the essay being summarized.
A celebration of Native Americans returning to their old ways of life. ... What does the Grand Coulee Dam represent to Native Americans? It represent great change on their way of life. The dam blocks the river which is causing negative effects on the salmon population.
Hope this helps.
1 and 3 are fast pace because they use face based word such as estate and ran.