Final answer:
In Flight Mode, with the Rate Knob selected at PIP mark, the cabin altitude will descend at a lower rate.
Step-by-step explanation:
In Flight Mode, with the Rate Knob selected at PIP mark, the cabin altitude will descend at a lower rate. This means that the cabin altitude will decrease at a slower pace compared to other rate settings. The PIP mark on the Rate Knob represents a specific descent rate that is typically set to ensure a smooth and comfortable descent for the passengers.