Option 1: (A)-(III), (B)-(IV), (C)-(I), (D)-(II) -> vane spins with wind, stake means interest, vain means futile, steak cooks on grill.
Option 2: (A)-(I), (B)-(III), (C)-(II), (D)-(IV) -> Incorrect matching - vain doesn't fit with weather device, vane doesn't mean interest.
Option 3: (A)-(II), (B)-(III), (C)-(I), (D)-(IV) -> Incorrect - steak doesn't spin on rooftops, vane doesn't mean interest.
Option 4: (A)-(IV), (B)-(II), (C)-(III), (D)-(I) -> Incorrect - stake isn't a weather device, steak doesn't mean interest.
Hence, Option 1: (A)-(III), (B)-(IV), (C)-(I), (D)-(II) -> Weather vane is the spinning rooftop device; personal stake means interest/investment; vain efforts means futile attempts; steak is meat that sizzles on a grill. These homonyms (words that sound alike but have different meanings) correctly complete each sentence contextually -> correct