Whats the best music collage to go to for techno, edm, dubstep, house and or jump style?

Artists best achieve contrast in a composition by: a. drawing with realism b. shading a drawing with dark and light values c. using drawing techniques like stippling and hatching d. focusing on line and shape in a drawing

(i think my answer is a, am i correct? ) a pentagonal traffic sign is a sign. a. school crossing b. parking c. wrong way d. yield

What computer software program was used to create the design for the structure above? what is the main advantage to this program?