Beaches have three main components - the nearshore, foreshore, and backshore. The nearshore extends seaward of the shoreline and contains sand bars formed by sediment deposition as wave energy is lost. The foreshore is the area between low and high tide marks affected daily by swash and backwash, depositing and returning sediment. The backshore lies beyond the foreshore and contains dunes, with sediment transported there during storms. Key beach features include berms, ridges and runnels, cusps, spits, and bars, formed by processes like deposition, swash action, and longshore drift.