Final answer:
Peter Gabriel used a variety of instruments including the flute, Mellotron, synthesizers, and varitone, contributing to the unique sound of Genesis with progressive rock and world music elements.
Step-by-step explanation:
Peter Gabriel, the lead singer of the band Genesis, is renowned for his innovative approach to music, which included the use of various instruments and progressive rock elements in his performances.
Gabriel was known for utilizing a mix of traditional instruments like the flute and more unconventional ones such as the varitone, which is an electronic effect that alters the flute's sound.
He also incorporated world music instruments and was among the first popular musicians to use the Mellotron and synthesizers extensively in rock music.