Can you awnser these questions please 1) How do you think periods of war change the way people create and understand art?
(think about the violence, insecurity, and change that usally accompany war.)

2) Do you consider dada artists? Why or why not?

3)Do you consider ready-mades art? Why or why not? Consider the questions posted in video 3. Does art have to made by the hand of the artist. is art just a concept/idea?

The linear perspective changed the quality of art because it gave art a sense of reality. it gave the illusion that the background and surroundings were actually close and/or far and a sense of depth. linear perspective change the quality of art following its birth the renaissance period as they want the art to be more realistic and they believe one way to achieve it is to use the method of linear perspective. it uses the principle of math to realistically portray space and depth in art. 

Chicken breast with a green salad in a serving of vegetables

The artist above used rapid brushstrokes 

Ibelieve the answer  is b.