3) to warn European powers not to interfere with independence movements in their former colonies in the Western Hemisphere
Explanation:
President Monroe’s speech warns European nations that the United States would not concede more colonization and monarchs rule in the Western Hemisphere. President James Monroe declares that America has never interfered in foreign affairs before. When the rights of the Americas threatened, then it became crucial for involving the issue. The Monroe Doctrine issued in 1823 as a foreign policy. The Doctrine threatens European nations which helped colonies in North and South America to adopt democratic government.
<h2><em>Physics</em></h2><h3><em>Physics, the study of the nature of things, began seriously in Greece in the 6th Century BC. With few exceptions (e.g. the work of Aristotle and Pythagoras) the study was an intellectual pursuit unaided by much in the way of controlled experimentation, which is standard practice today.</em></h3>