In what type of market do the actions of any one seller have a significant impact on the profits of all other sellers

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In an oligopoly, there are only a few large firms that dominate the market, and the actions of any one seller can have a significant impact on the profits of all other sellers. This is because each firm has a significant market share and can influence market prices and output levels. In a monopoly market, there is only one seller, in a perfectly competitive market, no one seller has enough market power to impact other sellers, and in a monopolistically competitive market, while there may be many sellers, they are differentiated and have limited market power.

In What Type of Market Do the Actions of Any