Answer:
It was written to call for peace during the Vietnam War, and urged people around the world to live in unity. One thing I like about this song is how it can bring different people together as one, as it is a very unifying piece. (hope this helps :)
Explanation: Lennon was asking us to imagine a place where the things that divide us, like religion and possessions, did not exist. He felt that would be a much better place. This song is a strong political message sugarcoated in a beautiful melody.
The two categories they fall into is <span>additive and subtractive</span>
Percussion. The instruments used change for each song and the amount of people needed can also change.