Final answer:
The song 'She's a Rainbow' begins with the musical element of a baroque-inspired piano introduction that sets a colorful and whimsical tone.
Step-by-step explanation:
The song "She's a Rainbow" by The Rolling Stones begins with a distinctive musical element, which is the sound of a piano playing a colorful, baroque-inspired figure. This piano introduction sets a whimsical, vibrant tone for the song, aligning with the song's title and lyrics that paint a picture of a colorful, effervescent woman. Much like a rainbow, the piano is vivid and somewhat enchanting, drawing listeners into the kaleidoscopic world of the song immediately from its opening notes. Music can be used to evoke emotions and tell stories, as seen in various artistic expressions such as the bright colors of a painter, the invocation of an audience in a musical theater, the poetic description of a blooming rose, or the emotional swell in a movie's soundtrack.