Authenticity
Authentic representation or realistic portrayal would be the opposite of caricature when depicting other cultures in works of fiction. This involves presenting diverse cultures accurately and respectfully, without exaggerating or distorting their characteristics for comedic effect or stereotypes.
problems of focus and interpretation.
The opposite of non-fiction is fiction.
The opposite of slash fiction is typically referred to as gen fiction. Gen fiction focuses on platonic relationships and does not contain romantic or sexual pairings between characters.
Fiction could be the opposite. Non-factual also could be the opposite.
The opposite of science fiction is typically considered to be realism or non-fiction. Science fiction often involves speculative elements and futuristic technology, while realism focuses on portraying events and experiences as they could occur in the real world.
The opposite of Science Fiction would be science fact.
There is no planet Nibiru. It is a myth, so any depictions of size or color would be fiction. (see related link)
The opposite of slash, which is homosexual, would by het, or heterosexual fiction.
No, non-fiction refers to writing or media that presents factual information or real events. It is based on real evidence and research, unlike fiction which is imaginary or invented.
B.universal theme
Writing that is true or happened in real life is called non-fiction. Since fiction means fake or didn't happen in real life, non-fiction means the exact opposite. Most biology, biographies, and animal science books as well as more are non-fiction. Fairy tales and others like that are fiction.
They can present a culture without bias or undue focus on elements that are irrelevant to the narrative.