What does Script Execution Order affect in Unity?

Script Execution Order in Unity determines the sequence in which the scripts in a game are executed during a frame update. This is crucial because the timing of script execution can significantly impact the gameplay and functionality of the game. For instance, if one script relies on variables or states set by another script, adjusting the execution order ensures that the dependent script runs after the one it relies on, thereby avoiding errors and ensuring the intended behavior in gameplay.

By properly managing the script execution order, developers can control how different components interact and ensure that events occur in a logical and predictable manner. For example, you may want to run initialization scripts before handling input or physics calculations to ensure everything is set up correctly.

The other options do not accurately represent what Script Execution Order affects. It does not influence graphics quality, compile order, or the timing of sound effects directly—though the execution order may indirectly affect how sound is played in relation to other script actions.