Final answer:
Platform as a Service (PaaS) is the cloud service model that offers a platform for the development and management of software applications without the need for maintaining the underlying infrastructure.
Step-by-step explanation:
The type of cloud service that provides an environment for buying, building, testing, deploying, and running software applications is Platform as a Service (PaaS). PaaS is a cloud computing model that offers a platform allowing customers to develop, run, and manage applications without the complexity of building and maintaining the infrastructure typically associated with developing and launching an app. This service includes development tools, operating systems, database management systems, and more, enabling developers to focus on the creative side of app development.