Which of the following is the most important part of sterilization using an autoclave?

b. the use of steam

This implies a temperature that's hot enough so there's steam.

Rejecting the rest:
a. irrelevant
c. increasing the pressure without using heat won't result in sterilizing
d. changing the time of exposure without using heat won't result in sterilizing

the most important would be increasing the pressure. And it can do this even with greater efficiency if compared with the use of steam.

There's no longer a single most important part of your body. Your entire organs work together in an organ process. For example, your brain wants the blood that your heart pumps to it. However your coronary heart additionally needs your brain, when you consider that your brain sends the indicators to "tell it" to pump the blood. I assume if I particularly needed to choose one part, i'd select the brain, simplest due to the fact that the nervous method controls all different ingredients of the physique. However I believe that there is no longer a major part of your body. But i will be able to let you know the least foremost is your appendix.