The sampling distribution of the mean describes the pattern that tend to follow when randomly drawn from a population.
a. sample data
b. sample averages
c. population mean
d. population data

B) sample averages

Explanation:

The sampling distribution of the mean is the average of the population obtained from the sample. It shows the patterns that the sample mean (or average) tends to follow. If the population distribution is normal, then the sampling distribution of the mean should follow the same pattern for all the samples obtained from the population. The mean or average of the sampling distribution should equal the population mean.

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.'