How can a smooth sequence from red-orange to yellow-orange be created in a sunset?

Correct answer: Through gradual ratios of red orange and yellow

The governing concept is gradual colour mixing between neighbouring warm hues. To move smoothly from red-orange toward yellow-orange, change the proportion of the warm components in small, controlled steps and test the intermediate mixtures. Option B is correct because gradual ratios create a continuous transition rather than a sudden boundary. Blue can muddy or shift the hue, a black line interrupts the blend, and one identical orange cannot show progression.