Final answer:
Predictable incremental delivery is enabled by practices such as Cadence and Synchronization in Agile software development, which establish regular delivery patterns and ensure that team efforts are harmonized.
Step-by-step explanation:
Predictable incremental delivery is a key aspect of Agile software development methodologies, and it is crucial in ensuring that projects deliver value to customers regularly and predictably. Among the listed practices, b) Cadence and d) Synchronization are the two that most directly impact the ability to achieve predictable incremental delivery. Cadence refers to a consistent, scheduled delivery pattern that helps teams to manage the flow of value and to plan effectively. On the other hand, Synchronization ensures that various components of the project or teams working in parallel come together in harmony, allowing for integrated and coherent delivery. While other options like Solution Intent and Architecture Governance play a role in the overall process, they do not directly drive the predictability of incremental deliveries as much as Cadence and Synchronization do.