Answer: many; identical; no barriers ; are well informed.
Explanation:
Perfect competition is a market in which there are MANY firms, each selling IDENTICAL product; many buyers; NO BARRIERS to the entry of new firms into the industry; no advantage to established firms; and buyers and sellers ARE WELL INFORMED about prices.
In a perfect competitive market there are many producers producing same product, giving the buyers a number of variety of options as to which particular product to go for.