A CTO is comparing cloud service models to balance control and responsibility and wants to manage only applications, not infrastructure. Which model is best?

Platform as a Service (PaaS) is the best fit because it provides a complete development and deployment environment in the cloud, allowing the CTO's team to focus solely on application development and management. The cloud provider manages the underlying infrastructure, including operating systems, virtual machines, and networking. IaaS would require the team to manage the operating systems and middleware, which goes against the goal of managing only applications. SaaS offers fully managed applications, meaning the team would have no control over application development or customization. "Hybrid as a Service" is not a standard cloud service model.