Final answer:
A manager should use a glass pitcher to serve red wine, as it is non-reactive and does not affect the flavor or quality of the wine, unlike wood, copper, or galvanized metal.
Step-by-step explanation:
The best material for a manager to use for pouring red wine in a pitcher for serving would be glass. Glass is non-reactive, which means it will not alter the taste or smell of the wine. Materials like wood, copper, or galvanized metal can potentially interact with the wine, affecting its flavor and quality. Wood can absorb wine and harbor bacteria, copper can react chemically with the acidic wine, and galvanized metal is coated with zinc, which can also react with the wine and lead to health hazards.
Therefore, for the purpose of maintaining the integrity of the wine and ensuring safety, glass pitchers are the ideal choice for serving wine.