The correct answer is A. Opening.
A vent is an opening that allows air or gas to flow in or out of a space. It can be used to ventilate a room, to release steam or smoke, or to provide a way for people to escape from a building in an emergency.
B. Stodge is a thick, heavy food that is difficult to chew. It is often made with flour, sugar, and butter, and it can be sweet or savory.
C. End is the final point in a series of events or actions. It can also refer to the point at which something ceases to exist.
D. Past is the time that has gone by since the present. It can also refer to events that happened in the past.
In the context of the question, the word “vent” is most likely referring to an opening that allows air or gas to flow in or out of a space. This is because the other options do not make sense in the context of the question.