Answer: c)Using soundwaves to break up stones into smaller pieces that can then pass naturally.
Step-by-step explanation:
The extracorporeal shockwave lithotripsy is a method or technique which is used to break the stones which may be present in the kidney or ureter. The high energy shock waves can also be in the form of soundwaves. This technology breaks the stones without surgery and into small pieces like that of sand grains.