Answer:
The correct answer is "dimensional analysis".
Step-by-step explanation:
A dimensional analysis is a type of calculation used frequently in engineering and science to express a quantity in the desired units according to the equivalence of the units at which the quantity is expressed. In this case, a teacher is describing how to convert the weight of water to the mass of water. Since the teacher explains a conversion system, it correspond to a dimensional analysis. For instance, other example of a dimensional analysis is to express units of length from inches to centimeters.