EMERGENCYY

I have a few Unity questions, very important, can you help me please?

1.When would it make sense to design a GUI with screen space set as World Space? Explain what this setting means and provide an example how it can be used.

2.Why do we create 'Walkable' areas on NavMeshes? How can we use other 'types' of areas alongside these walkable ones. Explain.

3.Using audio effects instead of recording audio would be more beneficial. Explain why is this the case, providing examples.