What is the definition of sand bars?

Sand bars are elongated landforms made of sand that develop in rivers, lakes, or coastal areas due to sediment deposition. They typically form in shallow water where the current slows down, allowing sand to accumulate. Sand bars can be partially submerged or emerge above the water surface, serving as habitats for various wildlife and influencing local ecosystems. Their shape and position can change over time due to erosion and shifting water currents.