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:
- The thesis is the position, the opinion of the author of a text, on the subject that will be addressed.
- In the text to which the question is related, the author wants to present a place called Palo Duro Canyon.
- In this presentation, the author shows everything impressive and admirable that this place has.
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.
You can find the text this question refers to in the image below.
More information on what a thesis is at the link:
https://brainly.com/question/892903
