What two animals that use echoes for navigation or communication?

Bats and dolphins are two animals that use echoes for navigation and communication. Bats utilize echolocation to detect prey and navigate in the dark by emitting high-frequency sounds that bounce off objects, allowing them to create a mental map of their surroundings. Similarly, dolphins employ echolocation by producing clicks and listening for the returning echoes to locate food and communicate with one another in their aquatic environment.