The world’s oceans are truly amazing. roughly seventy one percent of the earth is covered by oceans, and they are the home to countless fish, crustaceans, and other marine animals. the five major oceans—the arctic, the atlantic, the indian, the pacific, and the southern, which are then broken down into smaller seas—provide food for humans and animals, entice explores, enable trade, and affect the climate and environment the world over.

identify the organizational structure the author uses in section one to separate his topic into categories.
a) division
b) classification
c) cause and effect
d) order of importance