Final answer:
Segmentary opposition exemplifies an instrumentive/constructivist explanation for identity by illustrating the strategic formation of identities based on aligning with norms and expressing opposition to others within a society, demonstrating identity as a dynamic and performative construct.
Step-by-step explanation:
Segmentary opposition is an example of an instrumentive/constructivist explanation for identity because it demonstrates how individuals or states shape their identity through the strategic adoption and projection of norms and values. This constructivist approach to identity emphasizes the role of social structures and cultural contexts, viewing identities as dynamic and contingent upon interaction within a society. Segmentary opposition, in this sense, illustrates how segments within a society—such as groups, organizations, or states—align themselves against each other based on similarities and differences to form and reform collective identities that are instrumental in achieving specific goals, whether that be political, economic, or social. It serves as a tool to understand the performative aspects of identity construction, which can be a means of resistance or conformity depending on the social context and external pressures.