Before manipulating any area of the hubbard brook forest, the researchers spent several years studying the natural watersheds of the forest to try to understand how nutrients move through the various living and nonliving components (reservoirs) of the ecosystem.

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.

i think this picture will you.