Question

a peak flow reading in the red zone indicates the need to
stop treatment immediately.
continue on with current medications.
increase maintenance therapy.
seek medical attention.

Explanation:

Peak flow readings in the red zone (very low peak flow) indicate a severe worsening of respiratory function (e.g., in asthma). Stopping treatment (first option) is incorrect as treatment is needed. Continuing current medications (second) or increasing maintenance therapy (third) are not appropriate for a red - zone situation as it signals an acute issue. Seeking medical attention is the correct response as red zone means the condition is serious and needs professional help.

Answer:

D. seek medical attention