Sustainable development refers to A. placing restraints on a company's growth until all ancillary support services are in place to ensure a new venture's success. B. global economies that are slowly moving from an agrarian-base to an industrial base. C. conducting business in a way that protects the natural environment while making economic progress. D. global economies that are no longer dependent upon outside support or special tariff-free trade agreements. E. the process of manufacturing or producing products made exclusively from recycled materials.

The correct answer is letter "C": conducting business in a way that protects the natural environment while making economic progress.

Explanation:

Sustainable development is the capacity an institution has to satisfy individuals' needs without damaging the environment neither harming the atmosphere. To reach this stage there must be an equilibrium between the economy, society, and the environment. Sustainable development is difficult to be obtained with high poverty rates, habitats destruction, or indiscriminately resources exploitation.

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.'