Nature was his main subject matter :)
In B, "walk" is not a preposition, It's a verb >>we reject the answer.
In C, "wither" is not a preposition. >>we reject the answer.
In D, "whale" is not a preposition, it's a noun. >>we reject the answer.
so A is the correct asnwer!
ps. it there are also other problems in the rejected answers, for example, "wonder" is a verb, but one false word is enough, so I just gave an example.
I think the answer is YEWS but I'm not 100% sure. Hope this helps!!!!
Answer:
the author explains the story
Explanation:
the author shows and not just tells.
Answer:
why what ???????????????????????????????????
Explanation: