difference between visible/invisible & opacity 0-100

what is difference between visible/invisible & opacity 0-100

are both do same the thing

setting invisible won't draw the object, but if it is set visible and has opacity set to 0, it will still draw it even though you won't see it. Setting it to invisible is better for optimizing.

but when object is invisible it still alive their and works if we click over that area where invisible object is

The logic and collision still functions for invisible objects.

It's how I often do AoE explosion damage, by spawning an invisible sprite to test for collision.

opacity is an int, visibility is a Boolean, that's a pretty major difference if you ask me.

opacity is an int

It's a float actually

As mentioned, invisible objects are not actually drawn at all, which is faster than using 0 opacity. The only reason you'd ever want to set 0 opacity instead of setting the object invisible is in case you are using a WebGL shader that changes the opacity so something is visible.