Final answer:
Greece was the country associated with the lowest risk of heart disease in the Seven Countries Study by Dr. Ancel Keys, highlighting the benefits of the Mediterranean diet.
Step-by-step explanation:
In Dr. Ancel Keys' landmark Seven Countries Study, it was observed that the country associated with the lowest risk of heart disease was Greece. This finding aligns with the noted health benefits of the Mediterranean diet, common in countries like Greece and Italy. The diet consists primarily of high consumption of fruits, vegetables, olive oil, and low consumption of meats and saturated fats, which has been shown to improve cardiovascular health and lower cholesterol levels.