A. Law codes, religion, and economy are considered part of complex institutions. Complex institutions typically refer to organized systems that govern social, political, and economic interactions in a society, and law codes and religion are foundational elements of governance and social order. The economy as a structured system of production and distribution also fits within this context.
Marketplaces, public housing, and public entertainment are important aspects of society but are generally not classified as complex institutions in the same way as law codes, religion, and economic systems.