Which technique is primarily used for defining various elements of requirements at smaller levels of granularity?

Story Decomposition is a vital technique in Agile methodologies that focuses on breaking down larger user stories into smaller, more manageable tasks or sub-stories. This process allows Agile teams to define individual requirements at a finer level of granularity, making it easier to understand, estimate, prioritize, and implement these requirements in iterations.

By using Story Decomposition, a larger user story, which typically represents a significant piece of functionality, can be divided into smaller stories that can be completed within a single iteration or sprint. This incremental approach not only enhances clarity but also helps the team address complexity by allowing for a gradual and more focused implementation of features.

The other options relate to requirements in different ways but do not serve the primary function of breaking down stories into smaller units as effectively. While acceptance criteria help define specific conditions that must be met for a story to be accepted, they do not inherently break down the story itself. Story Elaboration involves further refining and discussing the details of a story but does not specifically focus on decomposition. Epic Decomposition refers to breaking down larger epics into smaller stories but is a broader concept that does not directly address the need for fine-grained requirements. Therefore, Story Decomposition is the most applicable technique for defining various elements of requirements at smaller