You and your two friends decide to open a new business selling a product online. instead of all three partners creating a product you each specialize in one aspect of the business. this is the most reflects the concept of exports be imports see absolute advantage comparative advantage

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Comparative advantage. The production of a good or performance of a skill for which a person is best suited is what is termed comparative advantage.  Or, on a national level, the production of goods for which a nation's resources are best suited is comparative advantage. Absolute advantage refers to one person (or one nation) having a consistent advantage over another in making a particular product efficiently and best. Read more on -

c) troops march forward in close formation against newer, more accurate weapons

2. a land bridge connected asia and north america thousands of years ago.

4. crossing the land bridge would have been simple for the first migrants.

5. people might have crossed a land bridge while hunting animals.