I'm sorry, but this question doesn't make sense. Echolocation is useful for the animals that can use it. It is used for orientation, obstacle avoidance, hunting, communication. Bats, dolphins, and some shrews, rodents and birds are all animals that can use echolocation.

"Bats use echolocation to move around." Is a sentence using echolocation

the echolaocation for measurnig the bottom of the ocean is the Doppler effect

Bats use echolocation.

well im not much of a exepert but dolphins and bats use ecolocation