Answer: Maybe about loss such as your pet, friend, family member. Or how much you love something/someone (like foods, movies, games, nature, ETC)
Explanation: I've made one about the loss of my dog, I gotten an A on it. Just an suggestion
The sentence that would best fit at the beginning of a first paragraph and would also make the best topic sentence is: Mammoth hot springs is a popular attraction because the springs are unique. The correct answer would be option D. This sentence is the correct answer because it is the only sentence that introduces the topic.
I believe the answer is D. Hope this helps you.
I would say beauty because usually when you are showing something and saying it in that way, it is usually something beautiful. hope this helped :)