Final answer:
AutoPlay is the Windows feature that enables users to define which application is used to open different media types. It can be configured in the Control Panel, enabling automatic actions when media like music CDs or photo DVDs are inserted.
Step-by-step explanation:
The Windows feature that allows users to select the program used to start different kinds of media, such as music CDs, or CDs, or DVDs containing photos, is called AutoPlay. Whenever you insert a media device, such as a CD, DVD, or USB flash drive, the AutoPlay dialog box appears, prompting you to choose an application with which to open the media.
You can configure AutoPlay settings by going to the Control Panel and searching for 'AutoPlay'. Within the AutoPlay settings, you can set the default actions for various media types and devices. For example, you can choose to open a music player automatically when a music CD is inserted or display photos using a photo viewer when a DVD with images is inserted. This feature offers convenience as it saves time by automatically launching the preferred application.