The power distribution of these phenomena is plotted on the Pierson–Moskowitz spectrum. Averaging the largest third of a sample of these phenomena is used to calculate a “significant” measure of their size (10[1])denoted H-sub-s. The tangent of alpha over the square root of the relative size of these phenomena equals the Iribarren number. Groins dissipate high-energy (10[1])types of these phenomena, (10[2]-5[1])which (10[2])are (10[1])caused by (10[1])a longer fetch. (10[1])Collisions between these phenomena (10[1]-5[1])form their large and destructive “rogue” (10[1])type. (10[6])These (10[1])phenomena (10[3])recede (10[2]-5[1])perpendicularly (10[1]-5[1])before returning at an (10[1])oblique angle when transporting (-5[1])sediment through longshore drift. (10[1]-5[1])For 10 points, (-5[1])shoaling (-5[1])involves a change (10[2])in what phenomena’s height, which is measured from crest to trough? (10[5])■END■ (10[10]0[2])