Four factors are required for marketing to occur: (1) two or more parties (individuals or organizations) with unsatisfied needs; (2) a desire and ability on their part to be satisfied; (3) a way for the parties to communicate; and (4) .

Something to exchange.

Explanation:

A very important aspect of marketing is the goods/service being consumed by the buyer. The buyers in exchange for the goods/services rendered to them pays money.

c

explanation:

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.'