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Which quality is most useful when choosing a reference unit for correcting proportion?

Answer and explanation

Correct answer: It should be clear and easy to compare

The governing concept is comparative measurement in proportion. A reference unit works best when its boundaries are clear, stable, and easy to compare repeatedly with other parts. For example, an artist may compare the length of an arm with the head or another known unit. Colour, distance, or surface texture does not provide a dependable measurement basis, so option A is correct.

Related tags

Reference UnitProportion CorrectionComparative MeasurementProportionPrinciples Of ArtArt EducationClass 9 Mcq

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