Final answer:
Individual Acts is not one of the four elements of the Social Structure; rather, Social Structure is made up of roles, groups, institutions, and organizing structures.
Step-by-step explanation:
The element which is not one of the four elements of the Social Structure is d) Individual Acts. Social structure is typically understood to consist of four elements: roles, groups, institutions, and structures that organize society, such as class systems or bureaucracies. Individual acts, while they can influence social structure, are not considered to be a foundational element of it. Social structure tends to be about the patterns and institutions that are enduring rather than the one-off actions of individuals.