I would like to know which artist and what painting please and id be happy to answer
A sad painting can show beauty in the sadness you felt during that experience. Usually the experience is something that is carried with you while the art is a way to release it.
Explain in a few sentences how different lines and shape can be manipulated to create a mood or feeling in a composition?
Answer: lines that feel stressed are heavy, jagged. Lines that are calm are soft, light. Scared lines might be small. Confused lines might be jumbled up.