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Components can indeed be removed from a GameObject if they are no longer needed. In Unity, each GameObject can have multiple components attached to it, which define its behavior and appearance. If a specific component is no longer necessary—for instance, if you have a script that handles an object smartly but it isn't required anymore—you can easily remove it through the Unity Editor or programmatically using methods like `Destroy()`.

This ability to manage components dynamically is crucial for optimizing performance and managing resource usage in a game. By removing components that are no longer in use, developers can reduce overhead, minimize memory usage, and streamline gameplay.

The notion that components can only be removed under certain conditions—such as when a GameObject is inactive or depends on the type of component—does not align with the flexibility Unity provides in component management. Thus, the answer that components can be removed when not needed is accurate and reflects the design philosophy of Unity's component-based architecture.