What aspect of TOGAF is primarily concerned with architecture governance?

The aspect of TOGAF that is primarily concerned with architecture governance is the Architecture Board. The Architecture Board serves as a governing body within an organization that ensures compliance with the architectural standards and practices defined in TOGAF. It oversees the architecture development process, ensuring that all architectural work aligns with the organization's strategic goals and objectives. Additionally, the Architecture Board is responsible for reviewing and approving architecture proposals, managing risks, and enforcing adherence to governance policies throughout the architecture lifecycle.

In the context of the other choices, the Architecture Development Method refers to the process and methodology for developing an architecture, focusing on how to create and manage the architecture rather than governance. The Architecture Content Framework provides a structure for organizing and understanding different architecture artifacts but does not in itself address governance. Requirements Management is concerned with identifying and managing the requirements that inform architecture and design, which again is separate from the governance discipline. Thus, the Architecture Board is the key entity that ensures effective governance of architecture practices within the framework of TOGAF.