<span>A) Ultraviolet light stopped the replication process of bacteria.
Stopped or slowed this process, hint the sterilization.
The question doesn't directly ask this but, after a while a lot of bacteria become immune to treatment especially antibiotics. </span>
The manipulated variable would be the moisture content.
the branch of science concerned with the bodily structure of humans, animals, and other living organisms, especially as revealed by dissection and the separation of parts. hope this helps :)
