I'm pretty sure it is Theme.
Theme is the central topic of the text. passage, story, or anything else. So it may possibly also be the same for the underlying meaning and universal truth...but again, I am not sure.
Answer: what has gandof come to talk?
Explanation:
A group of tourists have decided to hike.. has doesn’t make sense to me or makes sense in this sentence - hope this helps!
<span>A passive construction occurs when you make the object of an action into the subject of a sentence
:)</span>
