Which of the following produces the loudest sound?
A. Jet
B. Piano
C. Telephone
D. Cry of a baby

Why does sound become weaker or fainter as it moves away from the observer?
A. The sound is lowered by the operator
B. The sound spreads to cover the smaller area
C. The sound spreads to cover a larger area
D. The sound is already absorbed by the environment

Which pair of words is true?
A. Flute:loudest sound
B. Cricket:no sound
C. Whisper:soft sound
D. Ambulance siren:soft sound​