Natural resources are something that exist without any help from humankind. like rocks, trees, etc
In Uganda,civil war broke out between Muslims and Christians
I think this would be the Great Wall of China!
although it's actually thought to be much, much longer: over 5000 miles long, if yoiu include natural defensive barriers used in it.
Answer:
This answer would be the Pacific Ocean. Best of Luck to you, my friend! :)
Explanation: