Examlex
Which of the following observations helped Darwin agree with Lyell that Earth was more than a few thousand years old?
Labor
The human effort, including physical and mental efforts, used in the production of goods and services.
Average Total Cost Curve
A graphical representation showing a firm's total costs divided by output at various levels of production.
Output Levels
Refers to the amount of goods or services produced by a company, industry, or economy at a given time.
Rises
An increase, elevation, or improvement in position, level, or condition.
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