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Dog food manufacturers, such asRalston Purina, also have begun offering super-premium foods based on "life-stage nutrition." The marketing strategy Ralston Purina is using is calledtrading upstrategy.Trading upstrategy is considered as the practice in order to improve an offering, which is done by adding new features andhigher quality materials or adding products or services to increase the purchase price.So, this strategy tends to add a higher-priced,higher-qualityversion of a product to the range. This practice is mainly done to increase sales of the lower-priced model through consumer association.Hence, the strategy of trading up is used by Dog food manufacturers, such asRalston Purina.To learn more abouttrading uphere:brainly.com/question/15998236#SPJ1...