Which word best describes something that supports or strengthens a structure or argument?

• A. Bolster
• B. Bombastic
• C. Cacophony
• D. Archaic

Answer: (A)

The main idea here is identifying a word that means to support or strengthen something, whether it’s a physical structure or a case being made. Bolster exactly fits that sense: to bolster means to support, reinforce, or strengthen a structure or an argument. You can say evidence bolsters a claim, or a beam bolsters a wall.

The other options don’t convey this sense. Bombastic describes language that is showy and inflated rather than solidly supporting an argument. Cacophony refers to a harsh mix of sounds, not support. Archaic means old-fashioned or ancient, which has nothing to do with strengthening. So bolstering is the best fit because of its direct meaning of providing support or reinforcement.