Final answer:
The story's main themes are the consequences of pride, the development of friendship, and the importance of humility. While the importance of water in a desert is a relevant topic, it serves more as a setting than as a primary theme of the story.
Step-by-step explanation:
The theme of the story where a proud rose insults a cactus and ultimately relies on it for survival during a drought is multifaceted, encompassing both character growth and moral lessons. On one hand, the theme could be interpreted as pride leading to downfall, which is evident when the rose, so prideful about her beauty, ends up wilting due to the lack of water. On the other hand, another strong theme is friendship and humility, demonstrated when the rose, despite her earlier behavior, humbly asks the cactus for help and they survive together as friends. Lastly, although more indirectly, the theme could also be about the importance of water in the desert and the survival adaptations of desert plants, which is a background element supportive of the plot but not its central message.