Final answer:
Harry Belafonte is known for popularizing Calypso music, while Jimmy Cliff is a prominent figure in the spread of Reggae music internationally.
Step-by-step explanation:
Harry Belafonte and Jimmy Cliff are distinguished musicians known for their contributions to Calypso and Reggae music respectively. Harry Belafonte, an American singer, actor, and social activist, was instrumental in popularizing Calypso music internationally in the 1950s, especially with his hit the Banana Boat Song. Meanwhile, Jimmy Cliff is a Jamaican musician and actor who has played a significant role in the worldwide spread of Reggae music. With songs like The Harder They Come, Cliff helped bring attention to the genre outside of Jamaica. Therefore, the correct answer to which musical genres these artists participate in would be a) Calypso and reggae.