Contour lines define the outer edges of__?__. They also vary in __?__ and __?__. Contour lines give a greater sense of __?__ to the objects .

Igotta why is there only 2 semesters and 4 quarters and not 4semesters and 4 quarters? 1 quarter for each semester? ? is this a dumb question?

(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 is one of the most effective ways that artists create space in two dimensional art?