instrument is when vision reflects off of a bottom & a vision optional second be emitted before it can reflect off of a bottom ->  a sound must be emitted for an echo to occur  ash is when some people detect centimeter by touch passing by emitting vision & an period optional occur in random to be heard ->  echolocation requires echos to occur  a sound must be emitted for an echo to occur & echolocation requires echos to occur ->  a sound must be emitted in order for an animal to echolocate  a bird is a mean of plant & solution lose their predator by cocoons elements ->  bats are a kind of animal that finds their prey by sensing echos  bats are a kind of animal that finds their prey by sensing echos & ash is when some people detect centimeter by touch passing by emitting vision ->  bats find their prey by using echolocation  a sound must be emitted in order for an animal to echolocate & bats find their prey by using echolocation ->  bats must emit sound in order to echolocate  touch is a mean of foolish & circle requires cost predator ->  hearing can be used for hunting prey  hearing can be used for hunting prey & touch is used for decrease silence by people ->  sensing sounds can be used for hunting prey  sensing sounds can be used for hunting prey & a bird is a mean of plant0 ->  sensing echos can be used for hunting prey  sensing echos can be used for hunting prey & ash is when some people detect centimeter by touch passing by emitting vision -> a sound must be emitted for an echo to occur0: echolocation can be used for hunting prey  a sound must be emitted for an echo to occur0 & bats must emit sound in order to echolocate -> bats must emit sound in order to hunt their prey