If multiple Scrum Teams work on the same Product, what is necessary for their Sprint Reviews?

An integrated increment is essential when multiple Scrum Teams are working on the same product because it ensures that all the work done by the teams comes together cohesively. This integration allows stakeholders to see a complete, functional product increment at the end of each Sprint, fostering collaboration and providing a comprehensive view of progress.

Having an integrated increment promotes transparency, enabling all teams to align on the product's development and understand how their contributions fit into the larger picture. It allows for better feedback from stakeholders and facilitates discussions on any adjustments that may be needed moving forward. When teams integrate their work, it reinforces the collaborative nature of Scrum, ultimately driving a more successful product outcome.

While other options describe aspects of team dynamics or meetings, they do not capture the critical importance of integration for delivering a coherent product increment, which is vital for maintaining consistency and achieving the shared goals of all teams contributing to the same product.