What does a "fluid" environment suggest about an environment?

A fluid refers to a substance that has no fixed shape, such a substance is capable of flowing and it has little capacity to oppose external stress. In the same sense, a fluid environment refers to an environment that is subjected to continuous changes, the environment is very dynamic and nothing remain stationary for a long period of time. Sometimes the changes can be predicted based on what is currently happening, at other times, the changes may not be predictable before they occur. Thus, a fluid environment refers to an environment that keeps changing all the time.

there's the proffessional site that will you.

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.