Walls built perpendicular to the beach in pairs at the entrances to inlets and extending slightly out into the ocean to keep the inlet open are called

a. jetty
b. groin
c. breakwater
d. seawall

Why is the study of demography important to geographers

The ozone hole is at its biggest each year in the ? hemisphere in the ? season.

Most of the volcanic activity that occurs in the ring of fire is a result of the a. formation of mantle plumes away from plate boundaries. b. subduction of one plate under another. c. movement of two plates away from each other. d. sliding of one plate past another.