In which scene would the dominance of cool colours be most suitable?

Correct answer: Snow-covered valley

The governing concept is that cool colours, especially blues, blue-greens, and violets, can communicate coldness, quietness, and distance. A snow-covered valley naturally calls for a dominant cool palette, so option D is correct. A festival of lamps, a hot desert, and a burning furnace are associated more strongly with warm yellows, oranges, and reds. The choice is based on the mood and temperature suggested by each scene.