What is the definition of a beach?

A beach is a landform along the coast of a body of water, such as a sea, ocean, lake or river. It consists of loose particles, such as sand, gravel, pebbles, or cobbles, and is formed by the action of waves, tides and currents. Beaches are dynamic and constantly changing due to the processes of erosion and accretion. They provide important habitats for a wide variety of plants and animals, and are also popular recreational areas.