An example of an explecit cost of production would be

The cost of renting capital equipment like machinery for a business or the salaries paid to workers.

Explanation:

An explicit cost is an expense that is actually incurred by the business, meaning cash outflow. These costs are incurred to ensure that the business continues operating and the cash outflow reduces the cash balances of the business. Examples of such costs are like rental expenses and salary expenses. An implicit cost is the best alternative use of cash by the business that is not taken. An example would be: a business uses its cash to buy inventory instead of investing in fixed income securities. In this case, the implicit cost of using its cash resources is the foregone interest income that could have been earned from the interest bearing securities.

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.'

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