Question

any one is tell this answer please who is the science master​

Answer 1

because the men shadows were of other floor and she lived on other floor

Answer 2

Its becoz the frequency of our ear is upto 20htz if a person is near to us that it's quite natural for us to listen us but if he/she is standing at far distance may be more than 17 m distance than sound would not came back again. Upto 17 m only we can hear the sound