A.
They disagreed about who should control certain cities and regions.
They're used by humans for fossil fuel and in entertainment. They were not created by the human race, they were created through thousands of being underground and soft tissues quickly decompose leaving the hard bones or shells behind. Over time sediment builds over the top and hardens into rock.
Dough boys I hope it helps!!!!
Answer:
World War I changed the way wars were fought because of the widely known trench warfare. Because troops inside the trenches were much more protected than troops outside, it led to much more prolonged battles.
