Question

the arctic ocean is considered to be a part of which of these? the troposphere the atmosphere the hydrosphere the lithosphere

Explanation:

The hydrosphere encompasses all water on Earth, including oceans. The troposphere is part of the atmosphere (air - related layer). The atmosphere is the air around the Earth. The lithosphere is the rocky outer part of the Earth. Since the Arctic Ocean is a body of water, it belongs to the hydrosphere.

Answer:

the hydrosphere