Sand beaches are natural landforms along the edges of oceans, seas, lakes, or rivers, characterized by their sandy surfaces. They are formed by the erosion of rocks and the deposition of sand particles carried by waves and currents. Sand beaches provide habitats for various wildlife and are popular recreational areas for activities like swimming, sunbathing, and beach sports. The composition of sand can vary, often consisting of quartz, shell fragments, and other minerals. Factors such as tides, weather, and human activity can influence the shape and size of sand beaches. Many famous beaches, like Waikiki Beach in Hawaii or Copacabana in Brazil, attract millions of visitors each year.