Final answer:
A specialty store is a retailer that sells a wide variety of one type of product to dominate a particular market segment.
Step-by-step explanation:
The type of retailer that sells a huge variety of one type of product to dominate one type of goods is a specialty store. This form of retail falls under monopolistic competition, where many firms compete with each other by selling similar, but not identical, products. An example of monopolistic competition can be seen with the Mall of America, which has numerous stores specializing in specific types of clothing.
On the other hand, a monopoly exists when a single firm, like Microsoft, dominates the market with no close substitutes for its products. Furthermore, an oligopoly occurs when a few large firms dominate the market, often leading to collusive behavior to control prices and outputs.