Option 1 -> Incorrectly pairs "descent" with disassembling a machine, which doesn't fit the context of taking apart equipment.
Option 2 -> Correctly matches: disassemble (take apart machine), dissemble (hide feelings), descent (plane going down), dissent (voicing disagreement).
Option 3 -> Incorrectly places "descent" for disassembling and "disassemble" for voicing disagreement, which are contextually wrong.
Option 4 -> Incorrectly pairs "descent" with hiding feelings and "dissemble" with plane movement, which don't align with their meanings.
Hence, Option 2 -> (A) needs "disassemble" (take apart), (B) needs "dissemble" (conceal/disguise feelings), (C) needs "descent" (downward movement), and (D) needs "dissent" (disagreement/opposition). These homonyms sound similar but have distinct meanings that perfectly fit each sentence's context -> correct