Final answer:
Riverdance was influenced by Flamenco dance, Irish step dance, and Russian folk ballet.
Step-by-step explanation:
Riverdance was influenced by Flamenco dance, Irish step dance, and Russian folk ballet. These dance styles and music genres played a significant role in the development of the show. Flamenco dance brought elements of Spanish culture and technique, Irish step dance showcased the traditional Irish dance form, and Russian folk ballet added elements of classical ballet to the performance. The combination of these influences resulted in the unique and captivating production of Riverdance.