Answer:
The name of this concept is Leitmotiv (musical theme)
Step-by-step explanation:
Leitmotiv consists of a theme or musical idea that constantly appears throughout work in order to associate it with a character, object or idea. Despite never having specified such a term, the leitmotif technique was known to Richard Wagner who systematically applied it to his operas. Later, the use of leitmotiv also became part of other languages, such as cinema and soap operas.