Document the actions associated with each subject and object pairing is correct.

A subject object activity matrix is used in requirements analysis to record which subjects perform which actions on which objects. The matrix enumerates actors and resources and lists the expected activities between them so that functional requirements are clear and testable. This artifact helps trace requirements to use cases and test cases and ensures that no important interactions are missed.

Frame user level requirements that will drive the subsequent design phase is not correct because that option describes a high level outcome of requirements work but not the specific purpose of the matrix. The matrix documents concrete actor to resource actions rather than framing broad user level requirements.

Convert requirement details straight into detailed design documentation is not correct because the matrix is an analysis and modeling tool. Designers may use it as input but the matrix itself does not produce detailed design specifications or implementation details.

Map subjects and objects to access permissions for security configuration is not correct because that describes an access control mapping used for security policy and configuration. A subject object activity matrix focuses on capturing actions and interactions during requirements analysis rather than defining security permissions for configuration.

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