What is the normal respiratory rate for an adult?

The normal respiratory rate for an adult falls within the range of 12 to 20 breaths per minute. This range is considered the standard for healthy adults at rest, reflecting an efficient and regular breathing pattern necessary for adequate ventilation and gas exchange.

Monitoring the respiratory rate is crucial for assessing a person's respiratory health. A rate below or above the normal range can indicate potential health concerns such as respiratory distress or metabolic imbalances. The choice that includes 12 to 20 breaths accurately reflects physiological norms that healthcare professionals rely on for evaluations and interventions.

Other ranges provided do not align with established medical guidelines for adult respiratory rates, making the 12 to 20 breaths per minute the correct choice for this question.