The requirement viewpoint that will help the BA provide information on how requirements are structured is the business process model. A business process model is a graphical representation of the activities, events, flows, and roles that are involved in a business process. A business process model can help the BA to structure the requirements in terms of inputs, outputs, triggers, and outcomes of a business process.

The other options are incorrect because:

Option A is incorrect because a state model is not a requirement viewpoint that will help the BA provide information on how requirements are structured, but a requirement viewpoint that will help the BA provide information on how an entity or an object changes its state or behavior in response to events or conditions. A state model is a graphical representation of the states, transitions, and actions of an entity or an object within a system or solution.

Option B is incorrect because a business capability analysis is not a requirement viewpoint that will help the BA provide information on how requirements are structured, but a requirement viewpoint that will help the BA provide information on what an organization needs or wants to achieve its goals or outcomes. A business capability analysis is a technique that identifies and evaluates the capabilities or skills that enable an organization to perform its functions or processes.

Option D is incorrect because data streams are not a requirement viewpoint that will help the BA provide information on how requirements are structured, but a requirement viewpoint that will help the BA provide information on how data flows and transforms within a system or solution. Data streams are sequences or patterns of data that are produced or consumed by a system or solution.

References:

BABOK Guide v3, section 10.8: Business Process Modeling

CCBA Exam Questions, question 20