01 What is useful for keeping the edges of a poster-colour shape clean?
Answer and explanation
Correct answer: B. A controlled brush and correct consistency
Explanation: The governing concept is controlled application of poster colour. A brush held with steady pressure and paint mixed to a suitable consistency helps the colour stop at the intended boundary. Option B is correct because it combines brush control with proper thickness. Excess water causes spreading, whereas a dirty palette or folded paper makes clean edges more difficult rather than easier.