Traditional channels of distribution 1. are usually preferred to other distribution arrangements. 2. may involve little or no cooperation among channel members. 3. are easier to control than corporate channel systems. 4. do not perform bulk-breaking activities. 5. are usually controlled through strong legal contracts.

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.'

answer; i believe its (d) intrinsic;