Final answer:
In F. Scott Fitzgerald's novel, Nick advises Gatsby to move on from Daisy, highlighting the futility of Gatsby's obsession with recapturing the past.
Step-by-step explanation:
The advice that Nick offers Gatsby is to forget about Daisy and move on. In F. Scott Fitzgerald's novel The Great Gatsby, this advice is given during a pivotal conversation when Nick perceives the unhealthiness of Gatsby's obsession and the futility of his quest to win Daisy back. He sees the reality that the past cannot be recaptured and implies that Gatsby's idealized vision of Daisy does not align with who she truly is. Although Gatsby is the personification of certain themes such as unattainable love and individual identity, Nick's perspective offers a down-to-earth counterpoint to Gatsby's lofty dreams.