Which statement best explains the impact of a tailwind during takeoff?

A tailwind during takeoff decreases lift because the aircraft's groundspeed is higher than its true airspeed due to the wind pushing it forward. In aviation, lift is generated based on the aircraft's airspeed relative to the surrounding air, not the ground. When the tailwind is present, the relative airflow over the wings is reduced, resulting in decreased lift being produced.

Additionally, because the aircraft is effectively moving faster over the ground, more runway distance is needed to achieve the required airspeed for takeoff. Therefore, the presence of a tailwind indeed increases the takeoff distance because the aircraft requires a longer distance to reach the needed speed to lift off. This effect can be particularly significant during takeoff when lifting off efficiently is critical for safety.