Answer:
A) Symbolism
Explanation:
Symbolism is a literary device in which objects have a meaning that is different from their original meaning or function. These objects become symbols from something else.
To salute the flag means to use a gesture to show respect and love for it. However, someone who salutes the flag doesn't salute the flag itself. A flag can be just an object, but here, it is a symbol for something else - for our country. It turns out that someone who is saluting the flag is actually saluting their own country, showing their love and respect for it.