Answer:
1. They are rung at weddings and funerals, but at Christmastime, they are rung to announce the birth of Jesus.
2. It was a warning for them to worship.
3. Being an indication that there is something wrong.
4. The bells must ring in a sequence that will play the Rise of Iron theme. If you get it right, the solved puzzle will unlock the "Sing the Iron Song" trophy or achievement.
There you go! :)
Step-by-step explanation: