Which scenario best illustrates how comparative advantage can lead to mutual benefits in international trade agreements?

Comparative advantage means each country is better at producing something at a lower opportunity cost, even if one country is better at everything. For example, if Country A can grow rice and wheat but is relatively better at rice, while Country B is better at fishing, each should focus on what they can produce most efficiently. Country A specializes in rice and exports it to Country B, and Country B specializes in fish and exports it to Country A. By trading, both countries end up with more rice and fish than they could produce alone, so both benefit. This simple swap shows how trade based on comparative advantage can create mutual gains.