Task: Class Definition Understanding (ontology: Earth_Environment/SWEET)

Which of the following definitions best describes 'longshore current'?

A. A surface current flowing northward along the central axis of the Yellow Sea.
B. (Also called littoral current.) The resultant current produced by waves being deflected at an angle by the shore. In this case the current runs roughly parallel to the shoreline. The the concept is capable of carrying a certain amount of material as long as its velocity remains fairly constant; however, any obstruction, such as a submarine rock ridge or a land point cutting across the path of the current, will cause loss of velocity and consequent loss of carrying power.
C. The western part of the subpolar gyre in the deep (western) part of the Bering Sea.
D. Karst topography is a landscape shaped by the dissolution of a layer or layers of soluble bedrock, usually carbonate rock such as limestone or dolomite. [Wikipedia]

Answer: (Also called littoral current.) The resultant current produced by waves being deflected at an angle by the shore. In this case the current runs roughly parallel to the shoreline. The the concept is capable of carrying a certain amount of material as long as its velocity remains fairly constant; however, any obstruction, such as a submarine rock ridge or a land point cutting across the path of the current, will cause loss of velocity and consequent loss of carrying power.