Final answer:
Bebop is a style of jazz characterized by fast tempo and complex improvisation, pioneered by artists like Dizzy Gillespie, Charlie Parker, and Thelonious Monk. However, Louis Armstrong was not a contributor to bebop, as his influence lies in earlier jazz styles of the 1920s.
Step-by-step explanation:
Bebop was a revolutionary style of jazz that emerged in the 1940s, characterised by its fast tempo, complex harmonies, and intricate improvisation. Major contributors to the bebop genre included Dizzy Gillespie, Charlie Parker, and Thelonious Monk. They were at the forefront of this musical shift, crafting the sharp contours and dynamic rhythms that defined bebop. However, Louis Armstrong was not a contributor to the bebop style; he is better known for his foundational influence on the earlier jazz styles, particularly for his work in the 1920s, which predates the bebop era.