In a zero-sum game, if one player's gain is exactly equal to the losses of another player, this type of game is best described as:

In a zero-sum game, the total amount of resources or benefits remains constant, meaning that one player's gain is directly balanced by another player's loss. This means that if one player wins a certain amount, the other player loses the same amount, resulting in a net change of zero. For example, if two players are competing in a game where one player wins $10, the other player must lose $10. This concept is important in game theory because it helps us understand competitive situations where the interests of players are completely opposed. Overall, in a zero-sum game, the success of one player comes at the expense of the other, highlighting the competitive nature of the interaction.