Final answer:
Red lights are typically found on a. vertically striped buoys, which are part of the lateral marking system used to guide marine navigation. Yellow buoys and spherical buoys do not carry lateral significance and are used for special marking and mooring, respectively.
Step-by-step explanation:
The question pertains to the color indicators used on marine buoys for navigational purposes.
Buoys are a critical part of marine navigation, acting as the traffic signals of waterways, guiding vessels and indicating the presence of hazards or the nature of channels. They come in various shapes, colors, and configurations to convey specific information to mariners.
Red lights are traditionally used in lateral marking systems, which are part of the 'Red Right Returning' rule meaning that returning vessels should keep the red buoy to their starboard (right) side. Within this system, buoys are marked according to the direction of buoyage which is typically from seaward (from the sea towards the land).
Placement of red lights on buoys is specific, and according to the International Association of Marine Aids to Navigation and Lighthouse Authorities (IALA), which provides navigation guidelines globally, red lights are not typically found on yellow buoys or spherical buoys. Yellow buoys are usually special markers and do not generally carry lateral significance, whereas spherical buoys often indicate a mooring point and are not primarily used for navigational channel marking.
Considering these facts and in the context of the provided choices, red lights may appear on vertically striped buoys, which would coincide with the standard marine signaling system.
In conclusion, the answer to the student's question is: Red lights may appear on a. Vertically striped buoys.