1. A narrow, deep valley with steep sides.

Question

2.a narrow body of water that connects tow larger bodies of water.
3.a large, high, flat area that rises above the surrounding land.
Answers: Canyon, dune, isthums, plateau, savanna, delta tributary, oasis, reef, and strait

Answer 1

Canyon: A narrow, deep valley with steep sides.
Strait: A narrow body of water that connects two larger bodies of water.
Plateau: A large, high, flat area that rises above the surrounding land.