Which of the following is a sign of respiratory distress?

Difficulty speaking sentences is a sign of respiratory distress because when a person is experiencing challenges with their breathing, their ability to communicate effectively can be impacted. In situations where air supply is compromised or breathing is labored, individuals may struggle to take a full breath and therefore find it difficult to complete longer phrases or sentences.

In contrast, high energy levels suggest that a person is not facing significant distress, as energy is typically diminished when someone is struggling to breathe. Normal skin color indicates that oxygenation is adequate, while clear breathing sounds indicate unobstructed airways and effective respiration. Both of these factors would not typically accompany respiratory distress.