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What problem occurs if the reference unit keeps changing during comparative measurement?

Answer and explanation

Correct answer: Proportion comparisons will become inconsistent

The governing concept is consistency in comparative measurement. A chosen reference unit, such as the width of one part, must remain stable while other lengths are compared against it. If the unit changes, each comparison uses a different scale, so errors accumulate and proportions become unreliable. Option B is correct. Changing the unit has no direct effect on shine, texture clarity, or shadow softness.

Related tags

Object-ObservationComparative-MeasurementReference-UnitProportionObject ObservationDrawing BasicsArt EducationClass 9 Mcq

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