HELPPP I will mark brainlist if u get it correct

I believe the correct answer is Stage 4 because that is where the line Income is the lowest.

I hope this helps and have a great day :)

And please mark my answer brainliest if you can :)

answer; (b); i believe its indefinite existence of human population in a healthy and prosperous condition;

christianity is the most common religion in poland among the polish.