Kirsten opened a charming bookstore in a shopping plaza. business in other shops in the plaza has increased because of the customers kristen's bookshop has attracted. given the external benefits her bookshop generates, if kristen is selling the market equilibrium quantity of books, she is:

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; coefficient of correlation;

answervulnerability assessment;