Which of the following is a requirement for a flight to be conducted under VFR?

For a flight to be conducted under Visual Flight Rules (VFR), maintaining visual separation from other aircraft is indeed a key requirement. VFR allows pilots to navigate and operate aircraft by visual reference to the ground and other landmarks, as well as to see and avoid other traffic. This means that VFR flights must be conducted in a manner that allows pilots to visually perceive and maintain safe distances from other aircraft to ensure safe operations.

In contrast, having a valid instrument rating is not a requirement for VFR flights; it is essential for flying under Instrument Flight Rules (IFR) instead. Conducting flights during daylight hours is also not a strict requirement for VFR, as VFR operations can occur at night, provided the aircraft is equipped with the necessary lighting and the pilot meets specific qualifications. Furthermore, while operating within controlled airspace has specific requirements and limitations, VFR flights are not exclusively restricted to controlled airspace; they can operate within uncontrolled airspace as long as visual flight conditions are maintained.