What do the different colors of visible light represent?

The color of light is determined by the intensity of the different wavelengths that make up that light. People perceive color when electromagnetic radiation with a wavelength between 750 and 400 nanometers reaches the eye. The whole of the intensities of all those wavelengths is the spectrum.  The color of the surface of an object is determined by the spectral part of the light that is reflected by that surface, and the other colors are absorbed.

atp is used for energy.

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.