What was the main idea of the Monroe Doctrine?

It was a proclamation of war between the U.S. and Mexico.

It was a warning for European countries to stop colonization in the western hemisphere.

It was an agreement to give territories to the Native Americans.

It was a list of complaints from the U.S. to European countries.

Respuesta :

It was a warning to the European nations that if they tired to retake colonies or establish new one the US would defend the entire Western Hemisphere
The correct answer among all the other choices is "It was a warning for European countries to stop colonization in the western hemisphere." This point was the main idea of the Monroe Doctrine. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help.