Which colour group is used more often to show warmth and energy in a painting?

Correct answer: Warm colours

The governing concept is the emotional association of colour temperature. Warm colours—especially red, orange and yellow—often suggest sunlight, fire, heat, excitement and active energy, so artists commonly use them to express warmth and movement. Cool colours more often suggest calmness or distance, while neutral colours reduce strong temperature cues. Metallic colours describe a surface quality rather than a standard warm–cool group. Thus warm colours are the best answer.