My Answer: (Which was marked correct)
I think that Churchill uses the phrase a second time to emphasize it. In order to get his point across.
Explanation:
Repetition is a commonly used way to emphasize words and/or phrases.
Sample Response: (From Edg. 2022)
-He wanted to clarify his meaning.
-He wanted to emphasize his meaning.
-He wanted to drive home his point.
