How is a simulation different from a real$-$world process or system?

Group of answer choices

A simulation is a physical model, while a real$-$world process or system is a real$-$life phenomenon.

A simulation is an exact replica of a real$-$world process or system, while a real$-$world process or system is subject to change and uncertainty.

A simulation is a simplified representation of a real$-$world process or system, while a real$-$world process or system is complex and may be difficult to understand.

A simulation is a computer$-$generated model, while a real$-$world process or system is a physical phenomenon.