Answer :
Answer:
D. All of above
*If these were options for your question, D indeed is the answer*
A. varying the size of objects or subjects, so that some are smaller than others and the illusion of depth is created.
B. showing a change from light to dark in an object by darkening areas that would have a shadow.
C. placing part of one shape or form in front of another.
D. all of the above.