Modern economic growth:
multiple choice:
has been experienced by all countries around the world.
makes a country's output per person rise at a compounded rate.
refers to the phenomenon when a country's total output rises.
started occurring during the time of the roman empire.

Makes a country's output per person rise at a compounded rate.

Explanation:

Modern economic growth has led to compound rate of financial development, or the compound development rate, and the output per person which is measured by GDP per capita. Modern Economic growth has made numerous changes and has helped to improve the output ratio per person. This implies that the speed of development is being doubled by a base that incorporates past GDP development, with substantial impacts after some time.

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ans.

heterothermic organisms include those organisms that can switch between homeothermic (having body temperature higher than environment) and poikilothermic (having variation in internal body temperature) strategies.

some migratory birds show heterothermy as they decrease their metabolic rate during cold nights to keep their body temperature low. drop in metabolic rate allows increase in production efficiency of birds that reduces the internal body temperature to make it equal to external cold temperature during cold nights.

thus, the correct answer is 'birds allow their temperature drop in order to increase their production efficiency.'