1.) There is no “actual” evidence to suggest Bigfoot actually exists or existed, if Bigfoot did exist we would at least be able to find its droppings or fossils.
2.) Bigfoot is likely a figment of people’s imaginations from rumors they heard and then thought they saw while looking at shadows in an unfamiliar area.
3.) Bigfoot is also a scary story some parents made up to scare their kids into listening to them a long time ago and some people mistook it for reality instead of myth and thought it was true.
4.) Also our current technology could’ve found Bigfoot if it were real with radar signals or heat signatures but we haven’t signifying it is simply not true (unless they have no body heat or are invisible haha)
5.) Based In rumors Bigfoot is essentially an abnormally large extremely hairy version of mankind so if they are intelligent like rumors suggest they should’ve already interacted with mankind since a long time ago which they haven’t. (n’less their just shy hahaha)
Answer: The setting of a book helps develop a theme by giving key points of information that are critical to the story point. Time periods and locations are examples of settings that can contribute to the theme. Without specific details, some points of the story would be vastly different, or would not exist during that time period/location at all. Overall, it established the mood and energy of the story.