Fred trades 2 tomatoes to Barney in exchange for 1 pumpkin. Fred and Barney both gain from the exchange. We can conclude that, for Barney, the opportunity cost of producing 1 pumpkin is greater than 2 tomatoes.

Exchange

The process by which parties trade goods, services, or financial instruments, facilitating the transfer of ownership and value.

Tomatoes

A versatile fruit commonly treated as a vegetable in culinary uses, known for its red color and variety of shapes and sizes, important in many cuisines worldwide.

Pumpkin

A large, round, orange vegetable that is commonly grown as a food source and used as decoration, especially during Halloween and Thanksgiving.