How do electrons gain energy in photosystem 1?

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme

not too sure but maybe in the hot springs.

and after water is usually warmed by the sun the water temperature raises and then evaporates .

50% lit on the left side