How do they work, and what are their functions?

i believe it would be c: tons.

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.

answer: b

coz red blood cells marrow and circulates the body for 120 days.