Final answer:
In moderate persistent asthma, attacks occur more than twice a week but less than daily, which can interfere with daily activities and require daily medication.
Step-by-step explanation:
The symptom associated with the classification of moderate persistent asthma is that attacks occur more than twice a week but less than daily. Asthma is a chronic inflammatory disease of the airways that can cause episodes of wheezing, coughing, shortness of breath, and chest tightness. The frequency and severity of these symptoms, often triggered by allergens, air pollution, or other factors, are key to determining the asthma classification. Moderate persistent asthma can also involve exacerbations that interfere with daily activities and may require daily long-term control medication to manage.