A.The relationship between painting and sculpture.
B.The ideas behind an art ist' s work.
C.The practical value of a work of art.
D.The way the eye perceives shape in sculpture.
A.It is often displayed outdoors.
B.It does not always represent an object.
C.It is three-dimensional.
D.It is done by relatively few artists.
A.To give an example of natural shapes.
B.To describe early sculpture.
C.To illustrate their use as tools.
D.To demonstrate their role as decorative objects.