5. Explain why an energy pyramid had only one tertiary consumer at the top of the pyramid, but lots of producers at the bottom of the pyramid. Use at least two details from the passage.

What does the ricardian theory state? a. countries should produce all goods and services if they canb. countries should not produce goods and services that minimize opportunity costsc. countries should import goods and services if they are cheaper in other countriesd. countries should export all goods and services if they make a profit