He was the first to develop a process to manufacture steel.
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They did it by destroying their agriculture products
The correct option is this: TROOPS WERE BASICALLY TRAPPED IN THEIR TRENCHES, PREVENTING PROGRESS TOWARD SEIZING ENEMY TERRITORY.
A trench refers to a long and deep ditch, big enough to accommodate humans. Trenches were used by soldiers during the World War 1. Soldiers faced a lot of difficulties living in these trenches, and it become a disadvantage to German and the other allied power, because the trenches hindered their progress towards seizing their enemies' territories.<span />
Image result for Which of the following countries was never a member of the League of Nations
The Soviet Union was the only country to be expelled by the League (in 1939, following its invasion of Finland). Despite formulating the concept and signing the Covenant, the United States never joined the League of Nations.
Member: Ecuador; Soviet Union