The best way to combine both of the sentences would be: Soldiers and civilians began using the nickname Uncle Sam to refer to the United States.
What makes more sense out of all of them is number 2. Engage
The tale is told as if its happening once upon a dream
<h3>Which number is Main Idea? </h3>
Answer: Main idea (1) Storage facilities have become part of our culture.
Explanation: The other statements are examples to support the main idea.