c.a cello playing music at a concert
Vibration motion is produced when the strings of a cello are plucked by a musician. Vibration in a string produces a wave, and the vibrating string produces a sound of a certain frequency. Most often we see the tension of a string gets adjusted, and thus help to create a sound or music of a definite frequency.
Vibrational motion is best expressed among the given is a cello playing music at the concert. A cello is a music instrument it is primarily a string instrument. All its four strings are tuned in perfect fifths from low to high. All other option seem out of context. A cello is primarily an Itallian instrument its players are called Cellist.
a. a racecar driver speeding aroun...