I have a Physics Game and don't know which Time Scale to use

Hello, everyone. I am making a Physics-Based Video Game and I am working on a Pause Feature. When I searched for Time Scale I got 3 Time Scale. These two

were normal for me but this is not
And now I don’t know which Time Scale to use. So the question is, which one should I use for my game?

I’m sure the physics only affect the World for all physics objects
The other time scale are related to the layers
And the first one I think not sure is for the game itself

Will layers affect the Physics world?