Final answer:
Amazon EC2, Go Grid, Sun Grid, Windows SkyDrive, and Rackspace are examples of SaaS cloud services. Therefore, the correct answer option is a)
Step-by-step explanation:
Amazon EC2, Go Grid, Sun Grid, Windows SkyDrive, and Rackspace are examples of SaaS (Software as a Service) cloud services. SaaS is a cloud computing model where software applications are hosted by a service provider and made available to customers over the internet.
As for the other options, PaaS (Platform as a Service) refers to cloud services that provide a platform for developers to build, run, and manage applications without having to worry about infrastructure.
DaaS (Data as a Service) involves providing data access on-demand to users, while Laas (Location as a Service) refers to cloud services that offer location-based data and functionalities.