What may occur if oxygen bottle pressure drops below a specified minimum?

When the pressure in an oxygen bottle drops below a specified minimum, it is crucial to understand the implications this may have on the functionality of the oxygen supply system. The scenario of moisture collecting in the bottle becomes relevant because lower pressure can lead to condensation within the bottle, especially if there are fluctuations in temperature. This moisture can interfere with the purity and effectiveness of the oxygen being supplied, potentially leading to operational issues.

Understanding the importance of maintaining adequate pressure in an oxygen bottle helps in ensuring safe and reliable performance, as any collection of moisture can impair the intended function of the system and pose a risk to overall safety.

The other options bring attention to various other risks or operational consequences. However, the focus on moisture accumulation highlights a specific and substantial concern that can directly affect the quality of the oxygen being supplied for cabin atmosphere control.