A Once-Common Species of Butterfly Has Disappeared from a Region

question 219

Multiple Choice

A once-common species of butterfly has disappeared from a region of California over the past 50 years.The butterfly's gradual disappearance is correlated with a significant rise in average annual temperature and a significant decline in average annual rainfall.This suggests that the butterfly's disappearance is due to a change in

• A) climate, because butterflies only react to climate, not weather.
• B) climate, because the 50-year trend altered butterfly distribution.
• C) weather, because 50 years is not long enough for climate to change.
• D) weather, because heat and drought are weather, not climate, factors.
• E) some factor other than weather or climate that has not been measured.

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Definitions:

Income-Consumption Curve

A graphical representation showing how a consumer's optimal consumption changes in response to changes in income, holding prices constant.

Demand Curve

A graphical representation showing the relationship between the price of a good and the quantity demanded for it.

Downward-Sloping

A term used to describe a line or curve on a graph that moves from the upper left to the lower right, often associated with the demand curve in economics.

Complements

Goods and services that are used together, where the consumption or use of one increases the demand for the other.