When you have a monopoly you have a product or service on the market with no competition. On the flip side, in a pure or perfect competition there are various competitors selling the same product or service as you. The main difference between these two are that a monopoly involves no competition at all while a pure competition involves a high level of competition. (the first choice)
The second choice is incorrect because it is harder to establish a product in a pure competition market because you are competing with other companies.
The third choice is incorrect because a monopoly refers to a company with a product or service and no competition whereas a pure competition refers to one with the same products or services.
The forth choice is incorrect because they can be present in various economy structures.
Imposed by goveement below equilibrium price
