The song itself is controlled by both Boosey & Hawkes and the Bourne Company; various performances, arrangements, and recordings may have additional rightsholders.
Nobody owns the copyright of a single word. Perhaps you mean trademark.
the coca cola company owns the copyright
A minor owns the copyright on any works they create.
Universal.
Foolish Things was created in 1997.
Word Music.
Paramount.
Rankin/Bass.
Rondor Music.
There are 24 different copyright-protected items by that name.
The phrase "copyright obtained" doesn't give any indication of who copyright might be assigned to.
You can't. It is a right that the writer owns. You can offer to buy the copyright.