Answer:
Delta : triangular shape
Butte : steep sides, flat top
Archipelago : many islands
Mesa : broad mountians, flat top
Explanation:
Deltas: are wetlands that form as rivers empty their water and sediment into another body of water/ Greek letter delta (Δ), which is shaped like a triangle.
Buttes: are tall, flat-topped, steep-sided towers of rock
Archipelago: a sea or stretch of water containing many islands.
Mesa: is a flat-topped mountain or hill.
