What role does the stream inside the cave play in the air system?

The stream inside the cave plays a crucial role in the air system by influencing the movement of air within the cave environment. As water evaporates from the surface of the stream, it helps to draw fresh air into the cave. This process can create a negative pressure environment that pulls air in from the outside. The influx of fresh air is essential for maintaining a balanced atmosphere within the cave, as it helps regulate temperature and humidity levels, contributing to the overall health of the cave ecosystem.

While other answers touch on related elements, they do not accurately represent the primary function of the stream in relation to air movement. The stream's primary effect is to facilitate air exchange by creating conditions that encourage airflow into the cave.