Longshore currents form because
a. waves hit the coast at an angle and form currents in the surf zone
b. beaches absorb waves and backwash in some areas of the coast
c. backwash leaves the shore with more energy than incoming swash
d. eroded material from the shoreline deflects currents parallel to the shore

A.     waves hit the coast at an angle and form currents in the surf zone 

Longshore currents form because of waves hit the coast at an angle and form currents in the surf zone. This currents of longshore are said to be typical to beaches have breaking surf or interacts with these circumstances. This phenomenon is also caused by the sea water’s pushing and sweeping into the sands’ angle at a single course.

The answer to the first one is barometer.

B  maybe the answer hoped it