Which cloud service model represents the lowest amount of responsibility for the customer, with the provider managing the facilities, utilities, physical security, platform, and applications?

The correct answer is the service model that represents the lowest amount of responsibility for the customer while maximizing the management handled by the provider. In this case, Software as a Service (SaaS) delivers fully managed applications over the internet. The cloud provider takes care of everything from the infrastructure, security, networking, and the software itself. This approach allows customers to simply use the applications without worrying about any underlying complexities.

With SaaS, users can access various applications directly from their devices, often via a web browser, which eliminates the need for installation or maintenance efforts on the user's end. They do not have to manage the physical servers, storage, or any part of the platform; they can focus solely on using the software to meet their business needs.

In contrast, the other service models involve varying degrees of customer responsibility. For example, IaaS provides users with raw computing resources but requires them to manage the operating systems, middleware, and applications. PaaS offers a platform for developers to build applications but still leaves aspects of application management to the user. DRaaS focuses specifically on disaster recovery solutions and has components that overlap with other models but does not fit the description of the lowest responsibility level offered by SaaS. Thus, SaaS is