Question

Which of the following sentences is punctuated correctly?
The ocean, floor contains mountains canyons and plains even larger than those on land.
The ocean, floor contains mountains, canyons, and plains even larger than those on land
The ocean floor contains mountains, canyons, and plains even larger than those on land.
The ocean, floor contains mountains canyons and plains even larger than those on land

Answer 1

@Dharmaputra_993

Answer 2

Which one separates each item on the list with a comma?

Answer 3

(that is, mountains, canyons, and plains)

Answer 4

@jesstatyouwew