Since the excerpt was not mentioned in your question, I can try to answer you in a general way. “Stone Fox” is a short novel published in 1980 by John Reynolds Gardiner. The story is about a little boy named Willy who enters a dog sled race in order to win $500 to pay back the taxes on his grandfather's farm. The book is about determination, courage and never giving up. Willy faces several challenges and obstacles that a child his age shouldn’t have to experience but he still believes he can win the race anyway and he won’t give up until he gets that prize.
To inform or explain something
What exactly is the question? She's fighting against the struggles, which would be the antagonist she is fighting. She is the protagonist because she's the heroic figure (I assume)
I think it's not valid because it doesn't say everything with six legs is an insect. As it is, the banquet table and insects just share a common trait. So, I would add that "Everything with six legs is an insect" before claiming that "the banquet table is an insect".