which describes a scenario in which the doppler effect is occurring?\nthe volume increases.\nthe pitch…

which describes a scenario in which the doppler effect is occurring?\nthe volume increases.\nthe pitch changes from low to high.\nthe pitch changes from high to low.\nthe volume decreases.
Answer
Brief Explanations:
The Doppler effect is related to changes in pitch (frequency) of a wave due to relative motion between the source and the observer. Volume is related to amplitude and not the Doppler - effect. When there is relative motion, the pitch can change from low to high or high to low.
Answer:
The pitch changes from low to high.; The pitch changes from high to low.