Melting of Ice and Thus Reduced Feeding Opportunities for Polar

question 27

Multiple Choice

Melting of ice and thus reduced feeding opportunities for polar bears is occurring because of the ________.

• A) increase in phytoplankton population
• B) drying up of rivers and streams
• C) constant breaking and reforming of hydrogen bonds in water
• D) increase in CO₂ and other greenhouse gases in the atmosphere

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Definitions:

Pure Competition

A market structure characterized by a large number of small firms, a homogeneous product, and very easy entry and exit.

Herfindahl Indexes

Measures of market concentration, calculated by summing the squares of the market shares of all firms within the industry to assess the competitive landscape.

Market Power

The ability of a company or entity to influence or control prices and total market output in an industry.

Four-Firm Concentration Ratio

A metric that measures the total market share of the four largest firms within an industry, used to assess the degree of competition and market concentration.