Final answer:
Epiglottitis is the airway obstruction characterized by tachypnea, increased respiratory effort, cough, stridor, and poor air oxygenation.
Step-by-step explanation:
The airway obstruction characterized by tachypnea, increased respiratory effort, cough, stridor, and poor air oxygenation is Epiglottitis. Epiglottitis is a condition in which the epiglottis, a flap of tissue that covers the windpipe, becomes inflamed and swollen, obstructing the airway. It is commonly caused by a bacterial infection and requires immediate medical attention to prevent respiratory distress.