6) between the majestic and useful marine animals, the chance of exciting new places to explore, the usefulness of trade, and the amazing effects on the climate, the oceans are among the most interesting areas of study. the author uses paragraph 6 to a) urge his readers to take action. b) readers understand his point about how oceans affect weather. c) describe to readers how the oceans humans and animals survive. d) provide readers with his conclusion about why oceans are interesting.