Each of these materials is often used to build acoustic guitars except:
O A. Wood
B. Glass
O
O
C. Plastic
D. Metal

i believe the answer is: a.  abstract forms were often used to represent human figures.

representing human figures in abstract forms is often used in the geometric period, not hellenistic  period.   during the hellenistic  period,   aesthetic value derived from creating arts which mimic the actual shape of a certain object or individuals.

hope this ! < 3

the answer of "what has three legs but never walks" is a yard stick. this answer can be found at