Does a paused activity, still receive callbacks from service?

So here is what I am trying to understand.

I have a service like this

public MyService extends Service {

    public List<MyListener> listenersList = new ArrayList<>();
    public void addListeners(MyListeners mylistener) {
          listenersList.add(myListener);
      }
    public void eventAOccured(){
          for ( MyListner mylistener : listeners ) {
               mylistener.eventAOccured();
           }
       }

    public void eventBOccured(){
          for ( MyListner mylistener : listeners ) {
               mylistener.eventBOccured();
           }
       }

}

And here is my MyListener Interface which activities

 public Interface MyListener {
     public eventAOccured();
     public eventBOccured();
}

Now we have three activites

public Activity1 extends AppCompatActivity implements MyListener{

    public static int myVariable = 1;
    //starts service. For sake of brevity I am skipping this part.
    MyService.add(this);
    //on click of a button 
    startActivity( new Intent (Activity1.this, Activity2.class);
    //Now I know this will put Activity1 in paused state

    @Override
    public void eventAOccured() {
          //Call activity 3
       }

    @Override
    public void eventBOccured() {
          myVariable = 3;
      }

}

This is the second activity which is called by clicking a button in activity 1. After Activity2 is launched, lets say eventB occurs. Now If I access myVariable from Activity1, will it be 1 or 3.

After some time let us say, eventA has occured. Now will Activity3 will be launched?

I know an activity being paused means it is no longer visible to the user, but will the communication with service continue?