In a requirements elicitation effort, the business analyst (BA) needs to define boundaries for business domains, categorize and create a hierarchy of items, and show data sources and their relationshi

Diagrams encompass a range of visual models - such as context diagrams for boundary definition, decomposition diagrams for hierarchies, and data flow or entity-relationship diagrams for showing data sources and relationships. Each diagram type communicates specific structural or behavioral information visually to a targeted audience, fulfilling all three stated modeling requirements in the question.

Graphics is too generic a term and typically refers to decorative or illustrative visuals rather than structured analytical models that define domains, hierarchies, or data relationships.

Matrices display relationships between two sets of items in rows and columns but do not naturally represent domain boundaries, categorization hierarchies, or data flow between sources.

Prototypes simulate user interfaces or system behavior for evaluation purposes and are not used to model domain boundaries, item hierarchies, or data source relationships.