The Single Most Important Feature of the North American Landscape

question 16

Multiple Choice

The single most important feature of the North American landscape before roughly 11,000 years ago was __________________.

• A) glacial ice
• B) extensive forest cover
• C) open prairie
• D) the absence of lakes

---

Definitions:

Downward Sloping

Refers to a graph line that shows a decrease in price leading to an increase in demand, commonly illustrated in supply and demand curves.

Economic Profits

Profit or loss calculated by subtracting total costs, including opportunity costs, from total revenues to determine overall effectiveness.

Average Rate

The mean quantity or figure computed by dividing the sum of all measured quantities by the number of quantities.

Above Average Profits

Earnings that exceed the norm for a particular industry or sector, often resulting from competitive advantages or efficient operations.