A reader should summarize the development of a theme by stating the theme, by using objective language and by using examples to explain the theme. The theme of the story refers to its topic or its central idea. The main way to build a theme is through characterization, motifs, and symbols. With these three things, the theme can be easily understood and constantly present in your story.
People during that time were not treated medically well, mainly because at that time people did not have a proper understanding of mental health issues
I would say that such a cruise ship would be an example of a supplier since on shore excursions presumably would be organized by the ship strictly for the ship passengers so this means the ship personnel would be the chief suppliers of this service.
It is important to understand why an author is writing something. As a reader, knowing the purpose or intent that the writer has for creating the piece of work helps you EVALUATE it better.