Which statement correctly describes the intertidal zone and its three subzones?

• A. The intertidal zone lies entirely underwater except during storms and is never exposed to air.
• B. The intertidal zone is the shoreline area alternately covered by seawater and air due to tides; the upper intertidal is exposed to air and desiccation; the middle intertidal is regularly submerged and exposed; and the lower intertidal is frequently submerged but exposed at low tide.
• C. The intertidal zone refers to the open ocean surface far from land.
• D. The intertidal zone is a region only exposed during low tides with no submergence.

Answer: (B)