Most multicellular organisms are composed of cells with different shapes and sizes, and those cells perform different functions. what
is the best explanation for this?

Explanation:

The best explanation is that they all have specific jobs to do..heart muscles are different to digestive cells, as are lung tissues

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg