Which of the following best exemplifies a cloud computing service?

Remote database management is the best example of a cloud computing service because it involves accessing and managing databases over the internet rather than on a local machine. This service highlights the cloud's capability to provide scalable and flexible database solutions where users can store, retrieve, and process data remotely without the need for local server infrastructure.

Cloud computing services typically offer on-demand resources and services to users, facilitating access from various locations and devices, which aligns perfectly with the characteristics of remote database management. It leverages cloud platforms to ensure that databases can handle large volumes of data while providing ease of access, collaboration, and reduced overhead for management, as opposed to relying on locally stored or maintained data solutions.