Which term describes the part of the land that is constantly covered and uncovered by tides?

The intertidal zone is the area of the coastline that is periodically submerged and exposed due to the rising and falling of tides. This region lies between the highest high tide and the lowest low tide. It is characterized by a unique ecosystem that includes a diverse range of marine organisms adapted to both underwater and aerial conditions. Organisms found in this zone, such as crabs, starfish, and various types of seaweed, must withstand the fluctuations in water levels and salinity, making this area significant for studies of biodiversity and the resilience of marine life.

The other terms refer to different features of the ocean or coastal geography. The continental slope refers to the steep incline that connects the continental shelf to the ocean floor, the abyssal plain is a flat, deep part of the ocean floor that is typically found at depths greater than 3,000 meters, and the continental shelf is the submerged land that extends from the shore to the continental slope, which remains underwater at all tidal levels.