Question

Explain in a few sentences how different lines and shapes can be manipulated to create a mood or feeling in a composition?

Answer 1

Sharp lines, shapes with lots of corners, etc., leave a viewer on edge. They can be used to represent harsh emotions such as anger or hate because those are sharp feelings.
Steady patterns of lines, such as waves like an ocean, create a sense of calm because patterns mean order, and order is commonly associated with calm.