Answer:
to promise uninterrupted continuation of the previous administration's duties and struggles → Paragraph 2
to remind all Americans to stay engaged in the effort to secure peace and liberty worldwide → Paragraph 1
to warn that only the victors can dictate how peace is established and how justice is carried out → Paragraph 4
to clarify that an end to the present world conflict can only come with complete allied victory → Paragraph 3
Step-by-step explanation:
I have been able to match each of the author's purpose in each paragraph.
Looking at the passage, we discover that in Paragraph 1, the speaker reminds Americans not to permit a momentary pause in the fight for victory. So, he encourages them to stay engaged in the bid to bring peace and liberty. In Paragraph 2, the speaker tends to make a promise to continue the previous administration's duties and struggles. This is seen when the speaker said "I want in turn to assure my fellow Americans and all of those who love peace and liberty throughout the world that I will support and defend those ideals with all my strength and all my heart. That is my duty and I shall not shirk it."
Paragraph 3 actually clarifies that an end to the present world conflict can only come with complete allied victory.