What does a steady increase in altitude suggest about vertical velocity measurement?

A steady increase in altitude indicates that the aircraft is gaining height over time, which is directly linked to a positive vertical velocity measurement. Vertical velocity, often measured in feet per minute, reflects how quickly an aircraft is ascending or descending. When altitude increases in a steady manner, it demonstrates that the aircraft is climbing consistently, meaning there is a positive climb rate. This phenomenon typically occurs during takeoff, in climb phases of flight, or when a pilot is intentionally gaining altitude. Therefore, the answer correctly aligns with the definition of a positive climb rate.