Scarcity: applies to a brain surgeon but not to a cab driver. is not a problem for politicians. exists only in rich countries. exists only in poor countries. occurs when a resource is not freely available.

occurs when a resource is not freely available.

Explanation:

Scarcity according to Oxford dictionary is refer to when there is not enough of something or it is difficult to obtain .

This can occur even in rich countries which may be caused by many environmental factors due to the fact that these factors can affect any country.

It doesn't mean the country will not have that resource but it just means it is not enough or plenty to supply everyone sufficiently.

This can also be caused by an increase in population which put a high demand on resources causing them to be scarce or causing them not to be enough for everyone.

answer; ///i believe the state is (pennsylvania);

hygrometers and hair thermometers (often found as part of hygrometers/psychrometers) can be used to measure humidity. barometers are used to measure atmospheric pressure, while anemometers are used to measure wind speed. so the 2nd and 4th choices should be the correct answers.