Final answer:
The processor's task among the options provided is to determine how memory is used, which is part of memory management. Other listed tasks are performed by software or the operating system, not directly by the processor.
Step-by-step explanation:
The task for the processor among the options provided is to determine how memory is used. This is related to the concept of memory management, which is a fundamental function of the processor within a computing system. Memory management involves keeping track of each byte in a computer's memory and deciding which processes will be allocated memory, when they will receive it, and how much they will be given.
Scheduling backups and updates, managing antivirus software, and translating between the operating system and hardware are generally tasks performed by software, scripts, or dedicated parts of the operating system, rather than the processor itself. While the processor executes the code that performs these tasks, they are not its primary function.