Question

which region of the united states contains rocky coasts and the appalachian mountains?
○ northeast
○ midwest
○ south
○ west

Explanation:

The Appalachian Mountains are located in the northeastern part of the United States. Also, the northeastern region has rocky coasts. The Midwest is more known for its plains, the south has different geographical features like coastal plains in some areas but not the main location for the described combination here, and the west has its own distinct mountain ranges (like the Rockies) and different coastal characteristics compared to the rocky coasts associated with the northeast - Appalachian area.

Answer:

northeast