Answer: It would be ocean's
Explanation: In this context the apostrophe show ownership, or WHOSE waters became choppy (I know an ocean is a WHAT and not a WHO but phrasing it like this in my mind always helped me). Without the apostrophe it would be the plural form of OCEAN.
I would start it off on what you will be talking about. For example, you could begin with what books and ebooks are both used for.
In the first body paragraph, you explain one reason why you believe ebooks are more useful. In the second paragraph, explain why other people may disagree, and then emphasize on why you think differently.
In a few more paragraphs, list more reasons that support your point of view and do your best to persuade the audience to agree with you. Hope this helps!
They stress Columbus's determination and fearlessness.
https://quizlet.com/_6iyhcg
