<span>the one that is NOT a factor in efficiency is: D. digestion
highest effiiency refer to a condition when your body is capable to perform with a great result with the least amount of effort.
Digestion does not necessarily infliuence the musle movement in your body and therefore could not be considered as one of the factors</span>
What are the possible answers
Preliminary, non-experimental, research that gathers information about behavior is called 
research.
There are several processes used to explain the removal of dirts or contaminants from surface, but the general name is called Cleaning
Cleaning is an umbrella name that involves the removal of visible soils mater from surfaces, there are other types of cleaning that involves the removal of non-visible matter from surface too e.g sterilisation.
Sterilisation refers to specific action taken to reduce the hazard posed by such contaminants, as opposed to general cleaning.
Learn more about cleaning here:
brainly.com/question/19819390
