The main idea of the last passage of the speech is "The president is asking for an official declaration of war against Japan."
Explanation:
The attack that took place on December 7th, 1941 on the U.S. Pacific Fleet's base at Pearl Harbor in Hawaii, was considered as a coward movement from the Japanese Empire, and an answer from the Congress was demanded in order to proceed to war, this in order to preserve and assure the security of the nation and its citizens.
The main idea of the last passage of the speech is c.The president is asking for an official declaration of war against Japan.This is because the president is talking about the war among US and Japan which began.
Another is used to refer to an additional person or thing of the same type as one already mentioned or known about while Other is used to refer to a person or thing that is different or distinct from one already mentioned or known about.