Final answer:
The term 'Bon Bon' is not recognized in music composition. Musical themes or motifs can be introduced at the beginning, middle, end, or randomly, depending on the structure and intent of the piece.
Step-by-step explanation:
The question "How is 'Bon Bon' thrown in music composition?" appears to be based on a misunderstanding or a typo, as 'Bon Bon' is not a recognized term in music composition.
In music, elements such as musical themes or motifs can be introduced at various points in a composition, including the beginning, the middle, or the end, or they can be used randomly throughout.
The decision on where to place a musical idea depends on the structure of the piece and the composer's intent.