What was theodore roosevelt's most significant contribution to the conservation movement as president?  establishing the first national park in the world at yellowstone  passing legislation such as the forest reserve act to protect forests  protecting large areas of federal land as national refuges, parks, and forests  creating the civilian conservation corps to maintain and improve national parks

How did the mexican war of independence differ from the american revolution? o a. only the american revolution was concerned with establishing a representative form of government. o b. only the mexican war of independence required military conflict to achieve its objectives. o c. only the american revolution succeeded in replacing a monarchy with another form of government. o d. only the mexican war of independence eliminated spanish colonial control over part of north america.