Answer:
See explaination
Step-by-step explanation:
Monopoly is a competition where there is a single seller and a single product in the market and hence no competition.
Monopolistic Competition is a competition where there are a large number of small firms competing with each other.
Oligopoly is a market that has a limited number of buyers and Sellers.
Perfect Competition is a market with large number of buyers and Sellers.
The pairing can be seen below:
1. Monitors is under monopolistic competition as there are a large number of firms competing.
2. USB drives this comes under perfect competition as there a large number of buyersand Sellers.
3. Central processing units (CPUs) this is under oligopoly as there a limited number of buyers and Sellers.
4. Microsoft's Windows this fall under monopoly market structure. They have no competition at all.