The theory of states that a nation should produce and sell goods to other countries that it produces most efficiently, and buy goods from other nations that they produce more efficiently. Group of answer choices
Import
Export
mercantilism

comparative advantage theory is the answer

i believe that it is a 45% chance.

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.'