What type of applications can benefit from API access in Google Workspace?

The choice highlighting third-party applications that need to interact with Workspace services is correct because Google Workspace provides robust APIs that allow these applications to access and utilize the various services offered by Google. This includes functionalities like manipulating Google Drive files, accessing Google Calendar events, and managing Gmail messages, among others.

Third-party applications can enhance productivity by integrating with Google Workspace features, providing a seamless experience for users who rely on both the Workspace ecosystem and external tools. Effectively, this interaction fosters better collaboration, automation, and data management between different platforms.

Other options do not align with the capabilities and intentions of API access in Google Workspace. Specifically, while Google's own applications can interact deeply with Workspace, they are not the sole focus of the API's design. Offline-only applications lack the necessary connectivity to utilize APIs effectively, and the phrase "all types of mobile applications" is too broad since not all mobile applications have a need or design to interact with Google Workspace services directly. Therefore, the most accurate and fitting answer is indeed the option regarding third-party applications.