Answer:
Riding alongside the car, the cyclist raced the driver.
Explanation:
the introductory phrase in this sentence would be "riding alongside the car" which you can identify because there's along a comma before "the cyclist raced the driver"
prepositional phrase starters
to, of, about, at, before, after, by, behind, during, for, from, in, over, under, and with
examples of these are
With a an addition of sprinkles she finished her cupcakes
During world war one, hungary and germany teamed up
Heyo here to talk ………
She feels terrified of Antigone