The following are examples of nonmaterial culture except
a.
books.
c.
political systems.
b.
family patterns.
d.
work practices.

The correct answer is "A. BOOKS"

Non-material culture are the creations of human beings that are not incorporated in physical objects. They are, for example, norms, values, symbols, beliefs and language. The norms are the rules and expectations through which the society forms the guide of conduct of its members.

c. reserves power to the states and people