Daisy's decision to choose Tom over Gatsby is a complex one that involves a variety of factors. One of the main reasons is that Daisy is ultimately more interested in preserving her own social status and reputation than in pursuing a romantic relationship with Gatsby. As Nick observes, "Her voice is full of money," suggesting that her attraction to Gatsby is based on his wealth and status rather than any genuine affection (Fitzgerald, 127).
Additionally, Tom represents stability and security, while Gatsby is viewed as unpredictable and reckless. Daisy ultimately decides to choose the safety and security that Tom provides over the uncertainty and risk that comes with a relationship with Gatsby. As she tells Gatsby, "I did love him once – but I loved you too" (Fitzgerald, 132). However, her love for Gatsby is overshadowed by her fear of the consequences of leaving her established life with Tom.
Furthermore, Daisy's decision to choose Tom can also be attributed to the societal expectations and gender roles of the time. As a woman, Daisy is expected to marry someone of her own social class and to prioritize the stability and security of a marriage over her own personal desires. Ultimately, Daisy's choice to remain with Tom can be seen as a reflection of the limitations placed on women in the society of the time.
In conclusion, Daisy's decision to choose Tom over Gatsby is complex and multi-faceted. While her attraction to Gatsby is based on his wealth and status, her decision ultimately comes down to a desire for stability and security, societal expectations, and the limitations placed on women in the society of the time. As such, it is a reflection of the broader themes and issues explored in the novel.