All of the options provided are considered themes as they represent central ideas or messages that can be derived from narratives or stories. However, if you are looking for a potential option that might be seen as less thematic in a literary context, "Justice isn’t always served" could be viewed as a statement about a situation rather than a broader theme. Themes are generally more universal and applicable to multiple contexts.
If you are required to pick one option as the least thematic, you could argue that "Justice isn’t always served" might be less of a thematic exploration compared to the other options, which encompass broader human experiences. But ultimately, all listed options can be considered themes. Please clarify if you would like to focus on any specific aspect.