(Please I would like if someone would answer these questions and explain it in detail for me. The person who answer correctly would be mark as brainlist) Examine the development and the conditions of World War 1: What changes in society led to the start of world war 1? How did the alliance system play a role in that? What was the structure and nature of Trench warfare? How did it impact the soldiers? How did the industrial revolution play a role in the style of warfare in WW1? How did the United States get involved? What was the CPI and what were the main themes of WW1 propaganda posters? What were the conditions and nature of the Treaty of Versailles? Why were the major consequences of the treaty?