Final answer:
After opening a bottle of wine, the server generally pours a small amount for the guest to taste, ensuring the wine's quality.
Step-by-step explanation:
After a server presents a bottle of wine to a guest and opens the bottle, the next step is typically to pour a small amount into the guest's glass for tasting. This allows the guest to confirm the wine's quality before it is served to all the guests. The opening process, which involves releasing the carbon dioxide pressure that has built up inside the bottle, is crucial to properly serve carbonated beverages like sparkling wines and champagnes. This pressure release lowers the solubility of CO₂ in the wine, which leads to the effervescence that sparkling wines are known for.