Why the results from the experiment suggest that there is an obstructive rather than restrictive pulmonary problem?

The results from the experiment indicate an obstructive pulmonary problem because there is a significant reduction in airflow, particularly during expiration, as evidenced by decreased forced expiratory volume (FEV1) relative to forced vital capacity (FVC). This pattern suggests that the airways are narrowed or blocked, making it difficult to exhale air fully. In contrast, restrictive pulmonary problems typically show a proportional reduction in both FEV1 and FVC, rather than a marked decrease in airflow. Thus, the specific airflow limitation points to an obstructive issue rather than a restrictive one.