What happens during the ejection sequence regarding the oxygen supply?

During the ejection sequence, the emergency oxygen cylinder is automatically activated. This is a critical safety feature designed to ensure that the pilot has an immediate and reliable source of oxygen when ejection occurs, especially at high altitudes where cabin pressure is not guaranteed or during rapid decompression.

The automatic activation of the emergency oxygen supply helps maintain the pilot's ability to breathe and function effectively in the chaotic environment following ejection. This is particularly important since the rush of ejection and the rapidly descending parachute could expose the pilot to conditions that inhibit normal oxygen flow.

Other options present scenarios that do not reflect the actual system behavior during an ejection. For instance, cutting off the oxygen supply or requiring manual activation would pose significant risks to the pilot's health and safety in an emergency situation. Increasing oxygen flow might seem reasonable, but it's not the standard protocol during an ejection sequence; ensuring a stable and available emergency oxygen source is the priority.