Answer:
When it comes to market systems, there's a general agreement around 4 basic and major types of structures namely: Perfect competition, Monopolistic (Imperfect) Competition, Oligopoly and Monopoly.
Althouth some are merely theoretical constructs, for the sake of the answer, the one describing the largest number of suppliers or business competing against each other for profit is "Perfect Competition", aka perfect market, where buyers and sellers are numerous and the quantity supplied equals the quantity demanded, reaching equilibrium.
Step-by-step explanation: