Which animation uses geometric shapes in Adobe Animate?

The correct answer is shape tween, which is specifically designed for creating animations that involve geometric shapes. This type of animation allows for the transformation of one shape into another over time, manipulating the properties of the shapes such as size, position, and color. Through shape tweening, you can create smooth transitions and morphing effects between different geometric forms.

In contrast, classic tween and motion tween primarily involve the movement and interpolation of movie clips and graphic symbols rather than basic geometric shapes themselves. While they can incorporate shapes, they do not fundamentally focus on the transformation of shape properties. Frame-by-frame animation, on the other hand, entails drawing each individual frame, which can be labor-intensive and less suited for simple geometric shape transformations compared to the efficiency of shape tweening.