Which model is primarily responsible for application deployment and management in cloud services?

The model primarily responsible for application deployment and management in cloud services is Platform as a Service (PaaS). PaaS provides a cloud environment where developers can build, deploy, and manage applications without the complexity of managing the underlying infrastructure. It offers a platform that includes operating systems, programming languages, libraries, and services that facilitate application development, making it easier for developers to focus on writing code and creating applications.

In a PaaS model, users can take advantage of automated tools for scaling, testing, and managing applications throughout their lifecycle. This model fosters collaboration among development teams and offers flexibility in terms of resource management, allowing for a more streamlined application development process compared to Infrastructure as a Service (IaaS), where users manage infrastructure components, or Software as a Service (SaaS), which delivers software applications over the internet without the need for installation or management by the end-user.

BaaS, or Backend as a Service, provides a way to connect applications to cloud-based backend services and is focused more on backend functionalities rather than the full deployment and management of applications. Thus, PaaS is the most relevant model for application deployment and management within cloud services.