1 The cars raced on the tracks. The hunter killed the animal by following its tracks
Sorry I don’t know two for felt
3 The survivors lit a fire to stay warm. The soldiers had to fire their guns.
4 I asked my friend to scratch my back. We had to back up to make room.
A synonym is a word or phrase that means exactly or nearly the same as another word.
The literary device used on the title of the poem "War is Kind" is the following:
A. Irony
Irony is the expression of one's meaning by using language that normally signifies the opposite, typically for humorous or emphatic effect. This idea of expressing the opposite of what is actually being said/wrote is present on the title: in this case, by the use of the word "Kind".