What does it mean for a wine to be “fortified”?

Here is the question :

WHAT DOES IT MEAN FOR A WINE TO BE “FORTIFIED”?

Here is the option for the question :

• Longer fermentation
• Two grape varietals
• Aged at least 20 years
• Added distilled spirit

The Answer:

And, the answer for the the question is :

Explanation:

[STC0014984]. Have you ever thought that your drink could use an extra shot? You might enjoy fortified wines. Port, sherry, vermouth, and madeira are all wines that have been ‘fortified’ with a distilled liquor such as brandy. These wines have a lengthy tradition. Madeira, for example, was a favorite of America’s Founding Fathers. It was a favorite drink of Thomas Jefferson and a staple at George Washington’s Mount Vernon, and its taxation was even a catalyst for the American Revolution.