A person studying economics chooses to buy an economic textbook for their class, even though it means they cannot afford to buy a video game they want. This shows an understanding of

goods.
services.
production.
consequences and tradeoffs.

consequences and tradeoffs.

This decision demonstrates an understanding of consequences and tradeoffs. By choosing to buy the economic textbook instead of the video game, the person is prioritizing their educational needs over their entertainment desires. They understand that there are limited resources (in this case, money) and that making one choice means sacrificing another. This decision reflects an awareness of the consequences of their choices and the tradeoffs that come with it.