Final answer:
Roosevelt's 'big stick' foreign policy, represented by military intervention in the political cartoon, emphasized using military strength as a deterrent to achieve diplomatic goals and enforce the Monroe Doctrine.
Step-by-step explanation:
Roosevelt's idea of imperialism as shown in the political cartoon of the big stick is best represented by military intervention. This was a central aspect of his "big stick" foreign policy. The notion of "speak softly and carry a big stick" emphasizes the use of military strength as a deterrent, where the military's presence and the possibility of its use are intended to aid in achieving diplomatic goals without necessarily resorting to active combat. Roosevelt applied this principle in several foreign affairs, wielding the United States' growing military power to negotiate from a position of strength and to enforce policies like the Monroe Doctrine in the Western Hemisphere.