Which colour combination can most effectively show depth in a forest scene?

Correct answer: Warm yellow-green foreground and muted blue-green distance

The governing concept is atmospheric or aerial perspective supported by warm–cool and saturation changes. A warm, clearer yellow-green in the foreground tends to advance, while a less saturated blue-green in the distance tends to recede because atmospheric haze cools and mutes distant forms. Thus option B is correct. Uniform bright green flattens the scene, and the reversed red-orange distance would usually advance instead of receding.