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Why is the thumb position kept fixed on the pencil while measuring visual proportions?

Answer and explanation

Correct answer: To prevent the comparative measurement from changing

The governing concept is consistent comparative measurement. With the arm extended, the pencil acts as a simple measuring guide and the thumb marks a selected distance. Keeping that thumb position fixed preserves the same unit when comparing height, width, or intervals; moving it changes the measurement and weakens proportion. Therefore B is correct, while the other choices describe unrelated actions.

Related tags

Still LifeMeasurementProportionPencilPencil DrawingDrawing BasicsArt EducationClass 9 Mcq

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