Final answer:
The concept of comparative advantage applies to both individuals and countries, referring to the ability to produce a good or service at a lower opportunity cost.
Step-by-step explanation:
The concept of comparative advantage applies to both individuals and countries in economics.
Comparative advantage refers to the ability of a person, firm, or country to produce a good or service at a lower opportunity cost than others.
In the case of individuals, comparative advantage can be seen in specialized skills or talents that make them more productive and efficient in certain tasks. Similarly, countries have comparative advantages in the production of goods and services based on their available resources, technology, and expertise.