BPM interacts through which layer?

Business Process Management (BPM) primarily interacts through the presentation layer, as this layer is responsible for the user interface and user experience. BPM tools often need to provide a visual way for users to design, manage, and monitor business processes, which is facilitated by the presentation layer's capabilities. This layer allows users to engage directly with the processes, making it essential for BPM tools to operate effectively.

While the data access layer holds the information needed for processes and could be indirectly involved in BPM by managing data operations, the direct interaction showcasing BPM applications, process modeling, and monitoring occurs at the presentation layer. Therefore, it is this layer that primarily drives the user interaction and workflow management integral to BPM functionalities. This is why the focus is on the presentation layer for BPM interactions.