Which option in the YouTube Creator Studio allows you to add interactivity to videos?

The option in YouTube Creator Studio that allows you to add interactivity to videos is "Cards." Cards offer a way to add interactive elements, such as links to other videos, playlists, channels, or external websites. They can be displayed at any point during the video and are designed to encourage viewer engagement by directing them to additional content or resources related to the video they are currently watching.

Cards are particularly beneficial because they provide a clean and non-intrusive way to promote other content, ensuring that they enhance user experience without disrupting video flow. Creating cards involves selecting the type of card and configuring it within the video timeline, making it an effective tool for creators looking to drive traffic to other areas of their channel or external platforms.

Annotations, while once a feature used for interactivity, are no longer available as of 2017, making them an outdated option for this purpose. Comments allow for viewer engagement but do not add interactivity to the video itself. End screens are used to promote other videos or encourage subscriptions at the end of a video but do not allow for interactivity during the video playback.