Jawaban:

Bats catch insects in the dark using a system called echolocation. As they fly, they make shouting sounds. The returning echoes give the bats information about anything that is ahead of them, including the size and shape of an insect and which way it is going. Bats emit ultrasonic waves with very high frequencies that are too high-pitched for humans to hear naturally. Their sounds are reflected in the environment, hitting various objects and returning to the bat as echoes. The echo signals enable the bat to form a mental map of its surroundings.