D smoking damages cilia in the trachea and more particles enter the lungs
2 by applying sunscreen with a minimal SPF
Answer:
Cleaning.
Explanation:
Ultrasound are the high sound waves that has the frequency above than 20kHz. The ultrsonic sound can be detected by animals like bats and has medical importance as well.
The cleaning of the medical instruments and machines are done by ultrasonic cleaners. These cleaners uses the ultrasonic waves to clean the dirt and needs a proper solvent medium for cleaning. The cavitation bubbles are produced that are used for cleaning.
Thus, the correct answer is cleaning.
<span>D is the correct answer. Controllable risk factors are factors you have control over, for example environmental or behavioural. These are such things as sexual behaviour and smoking. Her age and heredity are examples of uncontrollable risk factors, as a person cannot determine these.</span>
