Final answer:
The correct cloud service model is Software as a Service (SaaS), which allows users to access and use applications without managing the underlying infrastructure or configurations.
Step-by-step explanation:
The cloud service model that allows consumers to access applications running in the cloud infrastructure without giving them the ability to manage the cloud infrastructure, or configure the applications is Software as a Service (SaaS). In this service model, consumers use the provider's applications running on a cloud infrastructure.
The applications are accessible from various client devices through either a thin client interface, such as a web browser, or a program interface. The consumer does not manage or control the underlying cloud infrastructure, including the network, servers, operating systems, storage, or even individual application capabilities, with the possible exception of limited user-specific application configuration settings.