Changes in tariffs and quotas are: Group of answer choices infrastructure changes. corporate strategies designed to maximize profits. efforts to stimulate choices among government agencies. government actions that reduce competition from international firms. business actions stimulating imports.

The answer is D. government actions that reduce competition from international firms

Explanation:

A tariff is a form of tax imposed by a government on goods and services imported from other countries. A tariff may be levied either to raise revenue or to protect domestic industries. On the other hand is quotas(import quotas) is a form of trade restriction that sets a physical limit on the quantity of a good that can be imported into a country in a given period of time.

Therefore, changes in tariffs and quotas are government actions that reduce competition from international firms.

answer; intensive use of a sales force and is relatively costly;

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.'