Which theme is prominent in Buck's development throughout the story?

The theme of the struggle for survival and adaptation is prominent in Buck's development throughout "The Call of the Wild." As the story progresses, Buck undergoes a dramatic transformation from a domesticated pet into a powerful and instinctual creature, emphasizing the harsh realities of the wilderness.

Initially living a comfortable life as a household pet, Buck is thrust into the brutal conditions of the Yukon during the Gold Rush. Here, he must navigate a world filled with competition, danger, and the need to fend for himself. This experience teaches him important skills such as hunting, fighting, and forging alliances, allowing him to adapt to his new environment.

Buck's journey illustrates not just the physical struggle against elements like hunger and cold but also an internal evolution as he reconnects with his primal instincts. The theme is encapsulated in Buck’s gradual acceptance of his wild ancestry, culminating in his embracing of the call of the wild, which symbolizes his ultimate return to nature. This prominent theme reflects the broader naturalistic perspectives of life and survival set against the backdrop of raw, unyielding nature.