Question

reason why the oxygen level decreases in the cave ?

Answer 1

Answer:

But when it's colder outside, air rushes back out. “This is important because the quantity of oxygen that's introduced in the entrance of the cave can depend on the low or high atmospheric pressure and of the temperature outside,” Perez says, adding that climate change may contribute to reduced oxygen levels.

Answer 2

oxygen that’s introduced in the entrance of the cave can depend on the low or high atmospheric pressure and of the temperature outside,” Perez says, adding that climate change may contribute to reduced oxygen levels. “There may have been a significant change in temperature in the last 30, 40 years that has made the cave blow more air toward the outside