Question

A long sand body more or less parallel with a shoreline but separated from it by a lagoon is a ____.

Answer 1

A long sand body more or less parallel with a shoreline but separated from it by a lagoon is a  barrier island.

Barrier island is form as waves repeatedly deposit sediment parallel to the shoreline. As wind and waves shift according to weather patterns and local geographic features, these islands constantly move, erode, and grow. They can even disappear entirely.

These islands are critical to protecting coastal communities and ecosystems from extreme weather. Beach dunes and grasses on barrier islands absorb wave energy before the wave hits the mainland. This generally means smaller storm surge and less flooding on the coast/ shoreline.

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