Which is least likely to push a species towards extinction?

Species that are broadly distributed are less likely to go extinct than those that occupy a small area or whose habitat is disjointed.

the missing space is phylum

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.