The excerpt with Gatsby reaching towards the green light showcases powerful foreshadowing in The Great Gatsby.
The best example of foreshadowing in The Great Gatsby is: 'he stretched out his arms toward the dark water in a curious way, and, far as I was from him, I could have sworn he was trembling. Involuntarily I glanced seaward and distinguished nothing except a single green light, minute and far away, that might have been the end of a dock. When I looked once more for Gatsby, he had vanished, and I was alone again in the unquiet darkness.'
https://brainly.com/question/30124420