Final answer:
In the context of retail, Target is not considered a category killer because it is a general merchandise retailer that doesn't specialize in one particular category to dominate it entirely, unlike specialized stores such as Office Depot, PetSmart, and Toys "R" Us.
Step-by-step explanation:
A "category killer" is a term used in retail to describe a large store that specializes in a particular type of product and dominates that category, often by offering a wide selection and competitive pricing that smaller retailers struggle to match. Examples of category killers include stores like Office Depot in office supplies, PetSmart in pet products, and Toys "R" Us in toys.
When considering the given options to determine which would NOT be considered a category killer, it's important to look at the business model of each store. Target operates as a general merchandise retailer and offers a wide variety of products across multiple categories. Unlike the category-specific focus of stores like Best Buy in electronics, Target doesn't specialize in one particular area to the extent of being a dominant force that could potentially push out smaller specialized competitors.
Therefore, among the options provided, Target (Option 4) would NOT be considered a category killer as it does not fit the definition of being highly specialized and dominant in one particular category of retail.