4) the most common airway obstruction is:
a. dentures
b. food
c. the tongue
d. none of the above

Option b. Food

Common experienced may encounter like not chewing properly the food. Baby mostly encounters it especially when they are starting to eat food. Adults as well, talking while eating when there comes a point in their conversation that they are giggling with their topic and one of their friends choke accidentally the food.

The correct answer is  "a) has ingredients that are high in nutrients."

Answeralong with the tissue lining,the blood,tissue,and unfertilized egg leave the uterus,going through the vagina on the way out of the body,(menstrual period);