This is an interesting question to ask,
President Roosevelt's mode of persuasion was "Ethos" this type of persuasion always involves the personal character of the speaker who is speaking.
Moreover, President Roosevelt was the 32nd president of the America , he served as president from 1933 to 1945. His full name was " Franklin D. Roosevelt". The scholars in America rated the Roosevelt very high and ranked him with one of the greatest presidents of american history.
Your answer will be the last option:
Using sensory details to describe and create an image for readers.
This is exactly what imagery portrays in any type of art, not memoir alone.
Answer:
soon difficult because it's on laptop