Why did Arthur die in Merlin?

Related questions

1. Are busters parents divorced?
2. Was Excalibur a real sword?
3. Was Merlin a real person?
4. What is the brain's real name on Arthur?
5. What's the dog's name on Arthur?
6. What is a anteater called?
7. Was Camelot a real place?
8. Does Arthur have a tail?
9. What animal is Francine?
10. Are Anteaters the same as armadillos?

Tags

1. #morgana
2. #destiny
3. #wander
4. #resume
5. #world
6. #mordred
7. #bring
8. #himself
9. #while
10. #arthur
11. #peace
12. #return
13. #leaving
14. #alone
15. #albion
16. #gwaine
17. #merlin
18. #waiting