What is the benefit of using ultrasound over light waves in the above applications?

Explanation

1) Light waves cannot penetrate in the inernal organs like liver, kidney etc.
2) Light wave after reflection do not form image.
3) Ultrasound waves can penetrate through internal organs like liver, kidney etc.
4) After reflection, ultrasound waves produce image. So, in ultrasonography and surgeries, ultrasound waves are better than light waves.