Airbus Inc., a company that builds airplanes, typically orders parts for its airplanes from other companies. is the practice Airbus Inc. is using.

Business Outsourcing

Explanation:

Business Outsourcing is a type of mercantile custom in which a company or firm order to another organization outside of the organization to provide parts and facilities of manufacture products that have generally been done in companies factory by the industry's workers and personnel. The outsourcing process is mainly done by manufacturing industries.

In the case of Airbus Inc., the company purchase parts from an outside source.

i think the answer would be b hope this

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.'