Vesicular breath sounds may be heard .
O on the throat below the larynx
O on the throat below the larynx, over the sternum, and at the triangle of auscultation
O over the sternum
O at the triangle of auscultation

vesicular breath sounds is heard on the throat below the larynx,over the sternum and at the triangle of auscultation.

Explanation:

Vesicular breath sounds are soft low pitched and normal sounds that is heard in the periphery of the lungs. It has greater intensity during inspiration phase than expiration phase. This is caused by accumulated fluid or air between the chest wall.

the speed increase from w to x due to increased gravity force

the speed decreases from x to y due to decrease in gravity

i it is d i hope it