Answer:
Sound waves. Anything that vibrates is producing sound; soundis simply a longitudinal wave passing through a medium via the vibration of particles in themedium. Consider a sound wavetraveling in air
It is B stationary front
sorry if i'm late
Option (d) is correct.
Distance is the total path length covered by the object.
so, for distance, we add all the path lengths
Here the total distance =7+5+2 =14 km
I would say d if I remember right I think that’s what I put and got right sorry if it’s wrong