The main theme could be the beauty of simplicity. Just by focusing on a tree, a rock and a cloud, the story might be trying to show that there is profundity in the most basic elements of nature.
It might be about finding meaning in the ordinary. These three elements - a tree, a rock and a cloud - are so common, but in the context of the story, they could hold deeper significance. For instance, they could represent different states of being. The tree is alive and growing, the rock is static, and the cloud is constantly in motion. This contrast could be used to explore themes of change, permanence and life.
In this short story, perhaps the author uses these three things - a tree, a rock and a cloud - to create a mood. The tree with its branches reaching out might give a feeling of welcome. The rock, being solid and unyielding, can add a sense of reliability. And the cloud, floating and changing shape, can introduce an element of mystery.
It could be that they interact in a magical world, like the cloud raining on the tree and the rock providing a seat for a tired traveler.
The main theme could be about survival. Since they are rock eaters, perhaps it's about how they adapt to their strange diet and the challenges it brings in their environment.
The main theme could be growth. The fig tree might symbolize growth, either of a character or of a situation in the story.
I think the main theme could be about survival. In many short stories, characters face various challenges and have to find ways to survive, and perhaps 'the fever tree short story' is no different.
The main theme could be isolation. In the story, the characters might be isolated from society or from each other, creating a sense of loneliness.
The main theme could be about the fir tree's longing for something more in life. It might be about its desires and how they lead it through different experiences.
One possible theme is sacrifice. The flowering tree, being a living entity in the story, might have to endure certain hardships or make sacrifices. This could be paralleled with the experiences of the human characters in the story, where they also face situations where they have to give up something for a greater good or for the sake of others.
One possible main theme could be the cycle of life. Just as the apple tree goes through seasons, from budding in spring to bearing fruit in fall and then being bare in winter, it can mirror the life cycle of the characters in the story.
The main theme could be about the power of suppressed anger and how it can grow into something toxic. It shows how holding onto negative emotions can have harmful consequences.