Final answer:
The region of the pharynx that helps equalize pressure in the middle ear is the Eustachian tube, which connects to the nasopharynx.
Step-by-step explanation:
The region of the pharynx involved with equalizing the pressure within the middle ear is connected to the Eustachian tube. This small passage connects the nasopharynx to the middle ear, and its primary function is to help balance air pressure on both sides of the eardrum. When we experience changes in altitude or pressure, for instance, during a plane flight or when scuba diving, this is crucial to reduce the force exerted on the eardrum, which we commonly refer to as 'popping' the ears.