PLEASE HELP

Below is a list of causes of the First World War. Rank These in order of significance (where 1 is the most significant and 6 is the least) and give brief reasons for the positioning of each reason in your list:
• the alliance system in Europe
• the naval and arms race
• the invasion of Belgium
• the assassination of the Austian Archduke
• imperial rivalries
• Russian mobilization

Will give brainliest, plus 100 points, plz need the esay asap aka today by 2: 30! write a well-developed essay identifying an american who contributed significantly to united states history from the period 1900 to 1940 and provide support to this claim. • the essay will include 5-paragraphs. • the first paragraph is the introduction paragraph. • the introduction paragraph will include the thesis sentence placed as the last sentence of the introductory paragraph. • a well written thesis sentence states the topic, the claim and the three reasons you chose your topic. • the three body paragraphs will include details for each reason chosen in your thesis. • each of the body paragraphs focuses on one reason per paragraph. • the conclusion will restate the thesis, have stated an important point from each body paragraph and wrap up the essay nicely. • cite your sources and write in your own words.