19
Lesson 19 of 84 · Trade and Commerce
Trade Routes Through History
Opportunity cost is what you give up when making a choice. Spending your allowance on a book means you cannot also buy a toy. Every decision involves trade-offs.
Key Facts
1
Money is a medium of exchange.
2
Needs are different from wants.
3
Supply and demand affect prices.
Check Your Understanding
Question 1
1 of 2What is trade?