Referring to the last item of a list in the next sentence
She spotted things she'd never seen before like three-wheeled bikes and elephants. She caught the sight of one of them on the sidewalk.
I want to replace one with a word that would make it clear that I'm referring to an elephant.
I'd say, "She caught sight of the latter, lumbering along the sidewalk." "Latter" makes it clear that she means the last one in the list and I added "lumbering" because that's how I see it in my mind's eye. :-)