Which is required for the light-dependent reactions in photosynthesis to occur? h2o atp nadph co2which is required for the light-dependent reactions in photosynthesis to occur? h2o atp nadph co2

The answer is; H2O & NADPH

The energy from the sun is harnessed by chlorophyll molecules in the leaves to split water molecules. The split results in the generation of high-energy electrons that are conveyed down chains of protein complexes in the chlorophyll molecules. The energy from the electron is used to pump H+ ions across stroma and form a protonmotive gradient. The electron lastly reduces NADP to NADPH.  

the answer is H20 on eddgenuity.