Read the sentence from "Violets."

The giddy, dancing sunbeams laugh riotously in field and street; birds carol their sweet twitterings everywhere, and the heavy perfume of flowers scents the golden atmosphere with inspiring fragrance.

Which is the best evidence that “giddy” means “light-headed or dizzy”?
the author’s description of the birds’ actions
the author’s description of the birds’ sounds
the author’s description of the sunbeams’ movements
the author’s description of the sunbeams’ colors