Final answer:
The film most associated with reggae music is 'The Harder They Come'. Released in 1972, this pivotal movie not only helped popularize reggae globally with its soundtrack but also features Jimmy Cliff, an influential reggae musician.
Step-by-step explanation:
The film that is most often identified with reggae music is A. The Harder They Come. This 1972 movie is not only a classic of Jamaican cinema but has played a significant role in popularizing reggae music around the world. The movie features Jimmy Cliff in the leading role, who is also a well-known reggae musician. The soundtrack of the film, which includes songs by Jimmy Cliff and other artists, is a landmark for reggae music, and it helped to introduce this genre to an international audience.
Reggae music began in Jamaica in the 1960s with influential artists like Bob Marley and the Wailers. The music is characterized by its distinctive rhythmic style with offbeat accents that evolved from earlier genres. It's tied often with the Rastafarian movement and has influenced musicians globally, with even bands like the Beatles and artists such as Eric Clapton incorporating reggae rhythms into their music.