North America is what of South America

North America is bounded on the north by the Arctic Ocean, on the east by the North Atlantic Ocean, on the south by the Caribbean Sea, and on the west by the North Pacific Ocean. ... North America's only land connection is to South America at the narrow Isthmus of Panama.

Explanation:

land

explanation:

australia is the flattest continent, and it has vast plains.

i i think it might b c