Final answer:
The Eustachian tube, also known as the pharyngotympanic tube, connects the middle ear with the nasopharynx and equalizes air pressure across the tympanic membrane.
Step-by-step explanation:
The structure that connects the middle ear with the nasopharynx is the Eustachian tube, also known as the pharyngotympanic tube. This tube is responsible for equalizing air pressure on both sides of the tympanic membrane and allows for proper vibration of the membrane in response to sound waves. It is normally closed but opens during actions such as swallowing or yawning to allow the pressure to equalize.
Therefore, in multiple-choice question format, the correct answer to the question, 'Connects the middle ear with the nasopharynx', would be:
A) Pharyngotympanic tube