The correct answer would be
A. Eustachian tubes
The answer would be false
Is there more to the question? According to the question it has options.
Metabolic rate is the rate of metabolism, the amount of energy used by an animal per unit of time. Basal metabolic rate (BMR) is the amount of energy used daily by animals at rest.
Antagonistic? the longitudinal and circular muscles work antagonistically in oesophagus to carry out peristalsis