Answer:
Corroboration. When you are analysing a source, it is helpful to compare what information it provides when compared with other sources. This helps you to more successfully evaluate your sources, especially in regards to their accuracy.
Explanation:
The answer is
D. King Phillip II (the second)
Trench warfare was the main style of war during World War I. It consisted of both sides of the war, called fronts, digging trenches in the ground for their soldiers to live and fight in. Trenches were deep ditches dug in the ground that were often cramped and dirty. As the dug trenches further forward, they would take more land in the battle.
This was a very slow process and often would result in tens of thousands of casualties for a few yards of land. This is especially true because of the heavy use of mounted machine guns that both sides of the war used. These guns would tear through enemies easily. This style of warfare was also vulnerable to bombings and gas attacks, as the soldiers were stuck in the trenches and the heavy poisonous gasses would sink into the trenches.
They had started using tools mad of bronze they melted and shaped into there tools
