Question

But I didn’t call to him, for he gave a sudden intimation that he was content to be alone—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.

Gatsby’s reaching from the darkness toward the light, creates
fear and loathing.
sadness and loss.
sympathy and insight.
mystery and interest.

Answer 1

mystery and interest.

The description—Gatsby’s sudden, solitary gesture toward a distant, almost unreal green light and then his vanishing—emphasizes the unknown about him and the light, prompting curiosity about his motives and the symbolic meaning of the scene.