Final answer:
The antonym of 'emblem' is 'd) Blank', signifying the absence of any symbolic representation. Bravery and freedom, associated with the American flag, are examples of nonmaterial culture, reflecting societal beliefs and values.
Step-by-step explanation:
The antonym of "emblem" is d) Blank. An emblem is a symbolic object that represents an idea, organization, or nation, such as a badge or crest. Its antonym would be something that does not stand for or symbolize anything, hence the answer is 'blank', implying an absence of representation or meaning. Now, considering the case of the American flag, it is indeed a material object that represents the U.S. However, the concepts of bravery and freedom that many people associate with the flag are examples of nonmaterial culture. This is because nonmaterial culture includes the ideas, values, beliefs, norms, and customs that are shared among members of a society, as opposed to physical objects and constructions, which are categorized as material culture.