How does Static Batching improve performance in Unity?

Static Batching improves performance in Unity primarily by combining static GameObjects into a single mesh, which reduces the number of draw calls that the GPU must handle. Each draw call represents a request to the GPU to render an object, and minimizing these requests can lead to significant performance improvements, especially in scenes with many static objects.

When static objects are batched together, Unity creates a single mesh that encompasses all of them, making it possible to draw them all in one go rather than individually. This approach is particularly effective when dealing with objects that do not move, rotate, or scale during gameplay since these objects can be statically combined without affecting their placement or appearance. As a result, the rendering process becomes more efficient, leading to smoother frame rates and better overall performance in the game.

The other options, while relevant to different aspects of performance optimization, do not directly pertain to the specific mechanism of static batching. For instance, processing animations together relates to dynamic objects rather than static ones, lowering texture resolution affects visual fidelity rather than draw call reduction, and optimizing shader complexity concerns the rendering techniques rather than batch processing.