Which of the following beers is known as an Irish Stout?

Beamish is recognized as an Irish Stout due to its traditional brewing history and style characteristics typical of stouts from Ireland. Irish Stouts are typically characterized by their dark color, creamy mouthfeel, and flavors that often include roasted malt, chocolate, and coffee. Beamish, originating from County Cork, embodies these qualities and has a legacy dating back to the 18th century, firmly placing it within the Irish brewing tradition.

In contrast, O'Hara's Irish Red is classified as an Irish Red Ale, which, while it may share some common geographic roots, does not fit the stout classification. McEwan's 70 is a Scottish Ale, which represents a different brewing style associated with Scotland rather than Ireland. Finally, Young's Double Chocolate Stout is an English stout, utilizing chocolate malt that contributes to its rich flavor profile, but it is not an Irish stout. Therefore, the identification of Beamish as an Irish Stout aligns it with the rich heritage and distinctive characteristics that define this category of beer.