The sentence showing the author's thesis can be seen in option D, which says: "This place and its striking diversity deserve recognition for doing exactly what nature does best: providing wonder to all ."
We can arrive at this answer because:
In the end, the author shows his opinion about the place by stating that this place is impressive, because of the diversity it has and this makes the place deserve recognition.
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More information on what a thesis is at the link:
https://brainly.com/question/892903