The ultimate donor is H2O, and the acceptor, NADP+. The energy that drives this electron flow is from light.
Well, the high energy and heat found in the photons of sunlight allow plants to make their own food, sustaining them long enough to be eaten by us, or to be eaten by animals about to be eaten by us. Plus we get direct warmth from the sun. These things mean that the sun is what keeps all organisms alive in the first place.
Okay so first order the numbers from least to greatest then the mode would be the number that comes up the most. The median is the number that is in the middles and the mean is the sum of all the numbers together and then divided by how many numerals in the set that there are
