1) Which he is being selected- is definite.
2) Mona wants to-which she wants to win first price for.
3) Is this the way- which to treat an old friend?
4) Even though in spite of being old- he is very active.
5) Which at sunrise- the farmer went to his field.
I believe the answer is B. Heroism and Patriotism.
Thoreau compares both armies in term what they fought for. He observed that on paper, the ants is way braver than the human army because they collectively fought for the survival of their colony.
Many humans on the other hand, fought for political reasons and money (proven by the amount of mercenaries in our war)