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In the context of physics, which of the following best describes the function of a parallel processing unit in the game "Subnautica: Below Zero"?
- The parallel processing unit in "Subnautica: Below Zero" is used to optimize the game's graphics rendering and physics simulations simultaneously.
- The parallel processing unit in "Subnautica: Below Zero" manages the player's inventory and crafting systems.
- The parallel processing unit in "Subnautica: Below Zero" is responsible for controlling character movement and interactions with the environment.
- The parallel processing unit in "Subnautica: Below Zero" handles the game's audio effects and background music.