What activities does public works encompass?

The correct choice accurately reflects the broad scope of public works, which includes not just the construction of new buildings, but also involves the alteration and repair of existing public structures or facilities. Public works can include a wide array of projects such as roads, bridges, parks, and utility systems, all of which may require initial construction as well as ongoing maintenance and upgrades.

This definition is critical because it recognizes the comprehensive responsibilities of public agencies in managing infrastructure and ensuring the community's facilities are functional and safe. By including both building and repair activities, the choice encapsulates the overall mission of public works to serve public needs and improve civic infrastructure.

Other options are limited in their scope and do not reflect the complete picture of public works activities. For instance, focusing solely on new construction or maintenance excludes significant aspects of public service and infrastructure management.