Work breakdown structure creation is a technique that can be used to plan and manage the business analysis work, but it is not a technique to specify or model requirements. Organization modeling, data modeling, and state diagrams are all techniques that can be used to describe different aspects of the requirements, such as the stakeholders, the data, and the behavior of the solution.Reference:

CBAP Handbook, page 6, Exam Blueprint, Knowledge Area 4: Requirements Analysis and Design Definition

BABOK Guide, Chapter 10: Techniques, Section 10.1: Acceptance and Evaluation Criteria Definition, Section 10.8: Data Modeling, Section 10.34: State Modeling, Section 10.37: Work Breakdown Structure