Life Has Been Sustained on the Earth

question 14

Multiple Choice

Life has been sustained on the earth

• A)for approximately six billion years.
• B)since the time of the last impact of the meteorite.
• C)through millions of years of ice ages and long warming periods.
• D)since the human species has been around.
• E)because of renewable resources.

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Definitions:

Marginal Utility

The extra pleasure or benefit gained by a consumer from using an additional unit of a product or service.

Utility-maximizing

Refers to the economic principle where individuals or households attempt to get the highest level of satisfaction from their resources.

Income

The money received, especially on a regular basis, for work or through investments.

Marginal Utility

The increased enjoyment or value one gets from the consumption of an extra unit of a good or service.