Final answer:
Scotch whisky must be made from malted Barley and distilled in Scotland. Its production process is akin to that of American whiskey, where natural resources such as limestone-filtered water in Appalachia create distinct flavors.
Step-by-step explanation:
The grain required for whisky sold as scotch is Barley. By definition, scotch must be distilled and matured in Scotland from water and malted barley, sometimes with whole grains of other cereals, and must be aged in oak barrels for at least three years.
The process takes advantage of Scotland's natural resources, including its water and climate, much like the distilleries in Appalachia, particularly in Kentucky and Tennessee, benefit from the natural filtration through limestone bedrock.
These conditions contribute to the unique characteristics of whiskies and bourbons, including the world-renowned Jack Daniels, which is distilled in Lynchburg, Tennessee—a dry county despite the large scale of its production.