Description : The sound produced by a bat is – (1) audible (2) subsonic (3) infrasonic (4) ultrasonic
Last Answer : (4) ultrasonic Explanation: Although bats use echolocation to detect their prey, and find their way around in the dark, the sounds which they emit are 'ultrasonic', which is another way of ... (audible) sound based on differences in physical properties, only the fact that humans cannot hear it.