Which feature of the timeline allows for adding interactivity to animations in Adobe Animate?

The timeline in Adobe Animate is a fundamental aspect of creating animations and adding interactivity. Keyframes are essential because they define specific points in time where changes occur in your animation. When you place a keyframe on the timeline, you can set properties for an object, such as its position, color, or opacity at that specific moment.

By using keyframes strategically, you can create smooth transitions and dynamic effects. Additionally, interactivity often requires scripting, which can be linked to specific keyframes to trigger events when the timeline reaches those points. This means that you can control how and when interactions happen based on the animation’s progression.

The other features such as layers are used for organizing your assets and separating different elements of your animation, while frame rate affects the speed of the animation playback, and the animations panel provides tools and presets for creating and editing animations. However, it is the keyframes that directly enable the ability to define points of interaction and changes in the animation, making them the critical feature for adding interactivity.