Final answer:
Magellan named the Pacific Ocean for its relative calmness compared to the stormy Atlantic, signifying a break from the voyage's previous hardships. Option fourth is the correct answer.
Step-by-step explanation:
The comparison between the Pacific and Atlantic Oceans in paragraph 6 essentially reveals why Ferdinand Magellan named the vast body of water the “Pacific”, which comes from the Latin “pacificus” meaning “peaceful.”
The context of Magellan's arduous journey, beset by hardships including rough seas, scurvy, and the threat of mutiny while in the Atlantic, contrasts strongly with the relative calm they experienced upon entering the Pacific Ocean. This respite may have felt like a form of peace compared to what they had endured. Therefore, the correct option that explains the reasoning behind the naming of the Pacific Ocean is:
That the waters of the Pacific Ocean were not as stormy and harsh as those the sailors had faced in the Atlantic.