Final answer:
Calypso is the popular music style associated with Trinidad's Carnival celebrations. Its origins are tied to African influences, and it has become significant in Caribbean musical heritage.
Step-by-step explanation:
The popular music style associated with Carnival celebrations in Trinidad is Calypso. Calypso music is deeply rooted in African traditions and history on the island of Trinidad. It first emerged in the early 20th century and has been a staple at Carnival and other Caribbean festivities.
The genre has experienced evolution over the years, incorporating instruments like the steel pan. A mainstream form of calypso was popularized internationally by Harry Belafonte's "Banana Boat Song."
The genre has been influential in the development of other Caribbean music styles, contributing a unique sound to the rich tapestry of the region's musical culture.