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Why is learning difficult when pressure angle speed and moisture are changed simultaneously during brush practice?

Answer and explanation

Correct answer: It becomes unclear which change produced which effect

The governing concept is controlled practice and isolation of variables. If pressure, brush angle, speed and moisture all change at once, a different result may be caused by any one of them or by their interaction. The learner cannot compare trials reliably or identify what to repeat. Thus option A is correct. The brush does not always break, paint does not stop drying by definition, and paper size is unrelated to this learning problem.

Related tags

Brush PracticeVariable ControlCause And EffectTechnique StudyBrush TechniquesPainting TechniquesArt EducationClass 9 Mcq

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