What types of lines are used to create a sense of movement in a piece of art

What convetion did chardin and delacroix use in the painting grace before meal and liberty leading the people to give the artworks a sense of harmony and stability?

Which principle of design is in primary use in this structure?

What is similar about the two images below? a. both contain earthlike colors. b. both reduce items to basic geometric forms. c. they share a similar composition d. they were painted by the same artist.