It might be about fate. The black ball could be a metaphor for an inescapable fate that the protagonist has to face. For example, it could be something that constantly haunts the character and determines the course of their life.
The main theme could be about struggle and discrimination. In many stories, a black ball can symbolize something negative or excluded, perhaps representing a character's battle against prejudice in a society.
One possible theme is the search for identity. The black ball could be related to the main character's sense of self. Maybe they are constantly trying to figure out who they are in relation to this black ball, whether it represents something they want to embrace or run away from.
Well, it could be that the main theme of 'after the ball short story' is about the contrast between the glamour and excitement of the ball and the ordinary or sometimes harsh reality that follows. The ball is a moment of escape, full of music, dancing, and socializing. But once it's over, the characters have to face their real lives again, which might include problems, responsibilities, or unfulfilled desires.
Since I don't know the details of the 'Black Ball' short story, it's hard to say exactly. However, it's common for there to be a character who is affected by the black ball in a profound way. There might also be antagonists who want to use the black ball for their own evil purposes, or perhaps other characters who are just witnesses to the events surrounding the black ball.
There could be a character who is an outcast in the story. This character might be associated with the black ball as it represents their status in society. And perhaps there's a character who is trying to help this outcast, a friend or a family member, and their relationship is explored in the context of the black ball.
Since I have no knowledge of 'the black chat short story', I can't be certain about its main theme. It could be a story that uses 'black' to represent a negative emotion or situation, and the chats in the story could be centered around that. For example, if it's about a group of people in a difficult situation sharing their thoughts through chats, and the 'black' could be a metaphor for their hardships.
The main theme could be the struggle between reality and illusion. The black monk might represent something that blurs the line between what's real and what's not in the protagonist's mind.
The main theme is often related to the power of the imagination and its impact on a person's perception of reality. The protagonist's hallucinations of the black monk show how his mind can create something that blurs the line between the real and the imagined.
The main theme could be about mystery. In many short stories set in a 'black city', mystery often prevails as the setting itself is rather gloomy and can hide many secrets.
The main theme could be about the mystery of the black dog. Maybe it represents something unknown or a symbol of fear.
Well, I think the theme is about kindness and cruelty. Black Beauty encounters both kind and cruel humans. For example, some owners take good care of him while others overwork and mistreat him. This contrast reflects on the theme of how kindness can make a big difference in an animal's life compared to cruelty.
As I don't have access to the 'the black ghosts short story', I can only guess at the main theme. It might be centered around the black ghosts as symbols. For example, they could symbolize the dark side of human nature or some hidden danger in the story's setting. Or perhaps it's about the search for the truth behind these black ghosts, which could imply a theme of discovery and revelation.