Echolocation is a biological sonar used by certain animals, such as bats and dolphins, to navigate and locate objects in their environment. These animals emit sound waves that travel through the air or water. When the sound waves hit an object, they bounce back, allowing the animal to determine the object's distance, size, and shape based on the returning echoes. This ability is particularly useful in dark or murky environments where visibility is limited. By interpreting the echoes, animals can effectively hunt for food, avoid obstacles, and communicate with others in their species, showcasing a remarkable adaptation to their surroundings.