Which option correctly shows a time transition through colour?

Correct answer: Gradually changing the palette from cool morning tones to warmer evening tones, or from light tones to darker ones

A planned palette transition can communicate the passage of time even when no clock or written label is present. Morning may begin with lighter, cooler or softer colours, while evening can move toward warmer, deeper, or darker tones. A random or unchanged palette gives no consistent temporal clue. Thus A is correct because the shift is gradual and connected to the story.