What is the lifesaving signal indicating "This is the best place to land"?

The lifesaving signal that indicates "This is the best place to land" is the green star rocket. This signal is part of the internationally recognized distress signals and specifically denotes a safe location for rescuers or aircraft to approach or land in a rescue operation. The green star rocket is highly visible and designed to attract attention, effectively communicating the safest area for support.

The other options serve different purposes. For instance, a red smoke signal typically indicates a distress situation but does not provide specific information about where to land. An orange smoke signal may also indicate distress and can mark a location effectively, but it lacks the specific "best place to land" designation. A white flare is generally used to signal for help or indicate position rather than to designate a safe landing area. Each of these signals plays a vital role in maritime safety, but the green star rocket is the one specifically associated with directing rescuers to a safe landing spot.