Which formations are created by wave erosion? a) Barrier beaches
b) Sandbars
c) Spits
d) Stacks

d) Stacks

Explanation: A stack or sea stack is a geological landform consisting of a steep and often vertical column or columns of rock in the sea near a coast, formed by wave erosion. Stacks are formed over time by wind and water, processes of coastal geomorphology.

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