$(a)$ What is the cause of the sensation of sound due to the rolling of thunder?
$(b)$ Give the audible range of the human ear.
$(c)$ What are infrasonic and ultrasonic waves?

(N/A) The rolling of thunder is caused by the multiple reflections of sound waves from various reflecting surfaces,such as clouds and the Earth's surface.
$(b)$ The audible range for the human ear is $20 \, Hz$ to $20,000 \, Hz$ $(20 \, kHz)$.
$(c)$ Sound waves with frequencies lower than $20 \, Hz$ are known as infrasonic waves,while sound waves with frequencies higher than $20,000 \, Hz$ $(20 \, kHz)$ are known as ultrasonic waves.