I might not have a solid answer and this website is very helpful.
https://plato.stanford.edu/entries/boundary/
i think it could have something to do with water. is there multiple choice options because that would make this question a hundred times easier to answer. I hope you find this helpful!<span />
Don't know for this answer but this is first queation I se e here more to more difficult
The animals are more realistically drawn than the humans.