What tool is used to visualize and manipulate animations in Unity?

The Animation Window is the tool specifically designed for visualizing and manipulating animations within Unity. This window allows artists and developers to create, edit, and manage animation clips and properties. In the Animation Window, users can view keyframes, adjust timing, and add various animated properties, making it essential for refining animations and ensuring they meet the desired artistic vision.

In this context, the other tools listed serve different purposes: the Hierarchy Window is used for organizing and managing game objects in the scene; the Inspector Panel is utilized for viewing and modifying the properties of selected objects; and the Project Window is where assets are organized, including scripts, prefabs, and models. While all these windows are integral to Unity's workflow, none of them provide the specific functionality for animation that the Animation Window does.