Why is it useful for historians to base certain studies on the analysis of geographic regions? a. the particular countries that make up each region do not change over time. b. experience has confirmed that analyzing regions is the most effective approach to history. c. the major historical themes apply only to certain civilizations in certain regions. d. societies located in the same region can affect each other's development.

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.