Which of the following best describes floodplains? a. an area that is incidentally flooded when farming or mining operations change the course of rivers b. a region of land that is periodically flooded when a river overflows c. an area that is periodically flooded because humans have altered the landscape d. an area where flood irrigation of crops is used, such as a rice paddy

b) A region of land that is periodically flooded when a river overflows.

Explanation:

A foodplain is, by definition, an area of flat land near a river that is often flooded when the river becomes too full.

Now, with this definition in mind let's take a look at the answers:

A. An area that is incidentally flooded when farming or mining operations change the course of rivers.

The definition of foodplain doesn't mention anything about activities caused by humans.

B. A region of land that is periodically flooded when a river overflows

This is correct, since the land is flooded when the river becomes too full (or in other words, overflows)

C. An area that is periodically flooded because humans have altered the landscape

Again, the definition doesn't state anything about human activities.

D. An area where flood irrigation of crops is used, such as a rice paddy

One more time, this is not the right definition, since the definition doesn't state anything about human activities.

Therefore, the right answer is b)

levels of production can be increased by technology while holding labor and capital constant, because increased technology makes the production process more efficient. subsequently, the lras curve is almost a vertical line, that can shift to the right, with an increase in technology.

the relationship between the lras curve and the ppc is that both can make the economy could grow. the ppc achieves that when it shifts outward because of more resources or technological advances while the lras curve shifts if more resources are developed or if there are technological advances.

the lras curve is a vertical line at an output level that represents the number of goods and services a nation can produce over a sustained period using all of its productive resources as efficiently as possible with all of the current technology available to it.

the production possibilities frontier (ppf) is a graphical device that is used for economic analysis of production decisions because the ppf measures the maximum possible combinations of two goods that an economy is capable of producing with its currently available resources and technology.

this headline suggests that midterm congressional   elections are at the corner and trump administration wants to activate his base by vowing to clamp down on immigrants and immigration as trump had said during his election campaign around two years ago. when a baby is born in usa, the baby becomes citizen of usa for 85 years and trump wants to end this rule of birthright citizenship to control illegal immigration and this what he said in an interview""we’re the only country in the world where a person comes in and has a baby, and the baby is essentially a citizen of the united states for 85 years, with all of those benefits,” "