Question

which feature does the highlighted area on the map show?
○ chesapeake bay
○ the appalachian mountains
○ the coastal plain
○ the ohio valley

Explanation:

The highlighted area's shape and location (along the eastern U.S. coastal region, a long, low - lying area near the coast) match the coastal plain. The Chesapeake Bay is a body of water, the Appalachian Mountains are a mountain range (not the long, low - lying shape here), and the Ohio Valley is inland. So the coastal plain is the correct feature.

Answer:

the coastal plain