Answer:
The correct answer is a thoughtful tone.
Step-by-step explanation:
This was their finest hour was a speech delivered by Winston Churchill on June 18, 1940. In the speech, Churchill justified the way he supported France during the Dunkirk Evacuation.
In literature, syntax, refers to how the sentences are placed together; it also refers to the words chosen for the message. This device is very useful to reinforce the main idea of the text or message; in this case, Churchill wanted to sound determined, so a thoughtful tone was used in the speech.