The answer that fits the blank provided above is BROTHER. This question is based on Harper Lee's novel "To Kill a Mockingbird". So when Atticus returns home for the first time after the trial, Aunt Alexandra empathized for him and called him Brother. Hope this helps.
The subcategory that fits the best the following words (applaud, cheer, observe, consume) is the following:
A.) Things you do at a celebration.
All the verbs on that group consistently exist on a celebration: applauds, the act of cheering, observing the events at a celebration and consuming different types of things depending on the celebration (cakes for a birthday or wedding, drinks for a party celebration, etc.)
I believe that the sections that answer the question are "We will not only defend ourselves to the uttermost..." and "With confidence in our armed forces..."