What are common signs of respiratory distress?

The correct answer identifies a range of symptoms that are typically associated with respiratory distress, which indicates that the body is struggling to obtain sufficient oxygen or effectively expel carbon dioxide. Wheezing, for example, is a high-pitched sound produced by airflow through narrowed airways, often common in conditions like asthma or bronchospasm. Shortness of breath refers to the feeling of not being able to get enough air, a major indicator that something is wrong with the respiratory system. An increased respiratory rate, or tachypnea, often occurs as the body attempts to compensate for low oxygen levels or other respiratory issues. Finally, cyanosis is a bluish coloration of the skin and mucous membranes due to inadequate oxygenation, making it a critical sign of severe respiratory distress that requires immediate attention.

In contrast, the other choices provide signs or conditions that do not align with respiratory distress. Increased appetite and weight gain suggest a state of wellness rather than a distress response. Fatigue and muscle soreness can be symptoms of various non-respiratory conditions or stress but do not specifically indicate issues with breathing. Likewise, stable oxygen levels and normal breathing suggest healthy respiratory function, which directly contradicts the concept of respiratory distress. Therefore, the signs highlighted in the correct answer are