Which of the following best describes Scotch whiskey?

Scotch whiskey is best described as being made primarily from grains. The production of Scotch involves the use of malted barley and other grains, which are essential components in the fermentation and distillation processes. Specifically, malt whisky is made from 100% malted barley, while grain whisky can include a mix of grains like corn and wheat. This classification into malt and grain whisky is crucial to understanding the essence of Scotch, as the type of grain used significantly influences the flavor profile of the final product.

In contrast, the other options do not accurately reflect the characteristics of Scotch whiskey. For instance, while corn is a primary ingredient in many American whiskies, it is not the main grain used in Scotch. Additionally, rye whiskey is predominantly made from rye grain and is distinct from Scotch. Lastly, the production of Scotch does not involve a notable use of fruits mixed with grains, further distinguishing it from beverages like certain fruit-based spirits or liqueurs.