Final answer:
The cloud service model that provides access to a specific application is Software as a Service (SaaS). It allows customers to use software over the internet without managing infrastructure or platforms.
Step-by-step explanation:
The common cloud service model that only offers the customer access to a given application is Software as a Service (SaaS). In the SaaS model, software applications are hosted by a service provider and made available to customers over the internet, typically on a subscription basis. The customer does not have to worry about the underlying infrastructure, platform, or software maintenance - they simply use the software through a web browser or app. This is in contrast to Infrastructure as a Service (IaaS) and Platform as a Service (PaaS), which provide customers with computing resources and platforms to develop or run their applications, respectively. Function as a Service (FaaS) is a cloud computing service that provides a platform allowing customers to develop, run, and manage application functionalities without the complexity of building and maintaining the infrastructure typically associated with developing and launching an app.