Concept:Homonyms are words that sound the same but have different meanings and spellings. Explanation:The question asks for an exemplar, meaning a perfect example, of homonyms.Option A: "aisle" and "isle" are pronounced identically but have different spellings and meanings (aisle = passage, isle = island).Other options have different pronunciations: beer/bear, stale/stall, stock/stoke are not homonyms.Thus, only option A fits the definition. Answer:Option A: aisle / isle