(Q).
Q: A wall of rocks or concrete that juts out into the ocean perpendicular to the shore is called?   Read this paragraph and choose the correct option from the provided answers:  Longshore drift can erode the sediment from a beach. To keep this from happening, people may build a series of groins. A groin is wall of rocks or concrete that juts out into the ocean perpendicular to the shore. It stops waves from moving right along the beach. This stops the sand on the upcurrent side and reduces beach erosion. You can see how groins work in Figure below .   Choices:  - shield  - rib  - fault  - groin   A:
(A).
groin


(Q).
Q: When do hammerhead sharks usually hunt?   Read this paragraph and choose the correct option from the provided answers:  Figure 29.11 Hammerhead sharks tend to school during the day and hunt prey at night. (credit: Masashi Sugawara).   Choices:  - summer  - in the day  - winter  - at night   A:
(A).
at night


(Q).
Q: What occurs when two wave crests overlap?   Read this paragraph and choose the correct option from the provided answers:  Constructive interference occurs when two wave crests overlap, doubling the wave amplitude at that location.   Choices:  - forth interference  - constructive overlap  - constructive dissonance  - constructive interference   A:
(A).

constructive interference