Which of the following is a common symptom of pneumonia?

Coughing is indeed a common symptom of pneumonia and is a significant indicator of respiratory conditions. In the case of pneumonia, the cough may be persistent and can be accompanied by mucus production. This symptom occurs as the body attempts to clear the infection from the lungs and can vary in intensity depending on the severity of the pneumonia. Other symptoms often associated with pneumonia include difficulty breathing, chest pain, fever, and chills, all of which relate to the respiratory system's response to inflammation and infection.

The other options, such as heartburn, headaches, and dizziness, are not typically associated with pneumonia in the same way. Heartburn is more related to gastrointestinal issues, while headaches and dizziness could be symptoms of a wide range of conditions but aren't primary indicators of pneumonia. Therefore, the focus should remain on the coughing as a key symptom when diagnosing or discussing pneumonia.