Final answer:
Echolocation is the ability of some creatures in the epipelagic zone to analyze sound waves to locate objects. Bats, dolphins, and whales use this technique to determine the distance between themselves and objects in their environment.
Step-by-step explanation:
Echolocation is the ability of some creatures in the epipelagic zone to analyze sound waves to locate objects. This is used by animals such as bats, dolphins, and whales, who emit sounds and sense the reflected sound waves to form a picture of their surroundings. They use this technique, called ranging, to determine the distance between themselves and objects in their environment.