Which of these landforms is a flat area on Earth's surface?
A. mountain B. valley C. plain D. canyon
C.Plain
200
Which landforms are higher than the land around them? A. mountains and valleys B. plains and plateaus C. plateaus and mountains D. mountains and canyons
C. plateaus and mountains
300
Which of these helps form a canyon? A. river B. sand C. mountain D. lake
A. river
400
Which of these landforms is surrounded by water? A. mountain B. valley C. canyon D. island