It could also be about change. Maybe the story uses the mango tree as a constant while the characters around it go through various changes. The tree witnesses their growth, their joys, and sorrows, and through this, the theme of change and the passage of time is explored.
There might be a group of friends as the main characters. They meet under the mango tree regularly, and their friendship, their adventures together, and the conflicts that arise among them form the core of 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.
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 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 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.
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.
The main characters are the boy and the mango tree. Simple as that.
Well, I think the theme might be related to the relationship between children and adults. The incident with the split cherry tree shows how adults can use such situations to teach children about responsibility. For example, the boy's father makes him work to pay for the damage, which is a way of instilling a sense of accountability in him. And as the story progresses, we can see how this interaction shapes the boy's understanding of right and wrong.