Interplay (noun)

1. The way in which two or more things or people interact with each other.
2. The relationship or cooperation between two or more things or people.

Origin:

Mid 19th century: from inter- "between" + play.

Examples:

1. The interplay of the different departments was crucial for the success of the project.
2. The interplay of the different instruments created beautiful music.
3. The interplay between the politicians was intense during the debate.
4. The interplay between the characters was interesting to watch.
5. The interplay between nature and technology was fascinating.