Final answer:
Ming is experiencing a constriction of the bronchioles during an asthma attack, known as bronchospasms, which restricts airflow and makes breathing difficult.
Step-by-step explanation:
During an asthma attack, such as the one Ming is experiencing, the airways in the lungs constrict, a condition known as bronchospasms. Specifically, this means that there is a constriction of the bronchioles, which are the small passageways that air flows through in the lungs. This constriction leads to difficulty in breathing as it reduces the airflow in and out of the lungs. During an asthma attack, the bronchioles do not dilate adequately in response to the body's need for air, and excessive mucus production can also occur, contributing to further narrowing and obstruction of the airways.
In conclusion, what's happening to Ming is: a) Constriction of the bronchioles.