I believe the answer is es.
Answer:
The correct answer is: by helicopter.
This is known as the Operation Frequent Wind, and it involved US personnel and a lot of South Vietnamese refugee who were working with the US, and who were in danger of retribution by other Vietnamese.
It had to done by helicopter because the airport was damaged.
Explanation:
A word that takes the place of a noun. e.g. she he, they, it, I.
e.g #1
the name "Katy" is a noun but you can replace it with a pronoun and say "she". Katy went to the shop// She went to the shop.
e.g #2
The name of an object is a noun e.g "ball" but you can replace it with a pronoun and say "it". The ball bounced// It bounced.
C all of the significant facts about the story.
why well cause it helps the reader find the information they're looking for