Cellular respiration.
It is the process of organic compounds oxidation that gives energy,occurs in all organisms.
C6H12O6 +9O2 -> 6CO2 + 6H2O
The vessels use three main colors (white, green and red) where each color alone, combination of two colors as well as the three colors together each has a certain meaning. This meaning is sort of an international code that is agreed all over the globe.
So, based on this code, the presence of only visible white light means that your vessel might be overtaking another vessel. In this case, you should give way to either sides. The other vessel should standby until an action is taken from your end.
They all contribute to genetic diversity, alternative D.