Question: What is the main difference between a groin and a jetty? a ) Groins are perpendicular to the shoreline, while jetties are parallel b )
What is the main difference between a groin and a jetty?
a Groins are perpendicular to the shoreline, while jetties are parallel
b Groins are built to trap sediment, while jetties are built to protect harbors
c Groins are submerged structures, while jetties are above the waterline
d Groins are made of concrete, while jetties are made of rock
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