When an employee reaches a $200,000 income level, they are required to pay a supplementary percentage to their tax deduction?A. Social SecurityB. MedicareC. FederalD. Local

B. Medicare

Explanation:

given data

employee reaches income level =  $200,000

so they are require to pay a supplementary percentage to their Medicare tax because at an income level above than the each and every employee are required to pay their additional percentage of income as  FICA Medicare tax.

and current rate for Medicare is approx 1.45% for the employee and  employer.

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.'