A. 1 keyword(s): govern
B. 2 keyword(s): process, collective decisions
C. 3 keyword(s): ...citizens participate in...
Answer:
Olshansky and Ault [10] proposed a “fourth stage” of epidemiologic transition, “The Age of Delayed Degenerative Diseases,” in which declining age-specific mortality results in a gradual shift of non-communicable burden to older ages, with underlying causes of death showing little change overall.
Gears are supposed to be softer than worms or pinions so they don't cause as much wear. Each tooth of a worm or pinion meshes with the teeth of the gear many more times in it's life than a tooth on the larger gear, two hard teeth meshing will wear more than a hard ans soft teeth. Having a steel gear would cause the worm to wear out too fast. Ideally the worm wheel should be phosphor bronze but bronze is expensive and plastic is cheap.
<span>The correct answer is:
a. Economics is the social science that tries to explain the choices people make concerning the limited resources that meet their needs and wants.
Note that people also include the government - since governments are made up of people.
Now, the reason why the other options are wrong:
b. Economics is the social science that tries to explain the reasons why the currencies of various countries are so numerous.
The currencies are an instrument, but not a necessary one. For example, the traditional economies don't use currencies at all!
c. Economics is the social science that tries to explain only the choices the government makes concerning supply and demand in the markets.
Reason why it's wrong: It examines the choice of both private and official choices !
d. Economics is the social science that tries to explain the spiritual choices people make concerning how to share limited resources.
- this is false as spirituality barely matters in economics except as a factor influencing people's choices!</span>
Limitations are important to understand for placing research findings in context, interpreting the validity of the scientific work, and ascribing a credibility level to the conclusions of published research. This goes beyond listing the magnitude and direction of random and systematic errors and validity problems.
