Can anyone tell me what a energy pyramid is

An ecological pyramid is a graphical representation designed to show the biomass or bio productivity at each trophic level in a given ecosystem. Biomass pyramids show how much biomass is present in the organisms at each trophic level, while productivity pyramids show the procreation or turnover in biomass.

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blue is scattered more than other colors because it travels as shorter, smaller waves. this is why we see a blue sky most of the time.