The legal authorization for the administrators of the governmental unit to incur liabilities during the budget period for purposes specified in the appropriations statute or ordinance and not to exceed the amount specified for each purpose is an:

The correct answer is Appropriations Budget.

Explanation:

Budget appropriations are maximum authorizations of expenditure that public entities approve to be committed during the respective fiscal period. After December 31 of each year, these authorizations expire and, consequently, may not be committed, added, transferred or counter-credited.

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.'