Henry’s organization relies on remote workers in multiple regions. Each region has an office where workers work part-time, and the organization’s core services rely on a variety of SaaS providers. What network model best describes this type of usage model?

This organization is using a decentralized model where there is no datacenter or primary hosting or operational facility. With remote workers making up much of the company, as well as flexible working locations, this design makes sense for the company but introduces additional complexity because endpoints will need to be secured wherever they are, regardless of what network they are on. A centralized design can somewhat simplify that, but modern application stacks and working conditions often make that less likely. This is not an on-premises design since workers and cloud tools are remote. There is no description of segmentation in the question.