Which code will change a material property for a single object in Unity?

The option specifying "Renderer.material" is the accurate choice for changing a material property for a single object in Unity. When using "Renderer.material," you are accessing the instance of the material applied to the renderer of that specific GameObject. This means you can modify properties such as color, texture, or shader values without affecting other objects that may be using the same material instance.

This action creates a unique copy of the material for that object if it is using a shared material, allowing changes to be made specifically to that instance while preserving the original shared material for all other objects. This is particularly useful when you want specific visual changes on a single object while maintaining the original material attributes for others that share the same material.

In contrast, "Renderer.sharedMaterial" would provide access to the shared material, which means any changes made to that material instance would affect all objects using that same material across the scene, thereby altering their appearance as well. "Renderer.SetMaterial()" is not a valid method in Unity for directly altering material properties; it would not function as expected in this context. Lastly, "Material.ChangeProperty()" is not a recognized method in the Unity API, indicating that it wouldn’t be a viable option to manipulate material properties.