The correct option is A photolysis
The process that invovles the splitting of water by utilizing the energy from sunlight is called photolysis. This is the first step of photosynthesis.
Hydrolysis is process in which the cleavage of chemical bonds occurs by the addition of water.
During photosynthesis, the phosphorylation of ADP to form ATP using the energy of sunlight is called photophosphorylation.
Electron transport chain (ETC) contains a series of complexes that transfer electrons from an electron donor to an electron acceptor via redox reactions. Coupled to this electron transfer is the transfer of protons (H+ ions) across a membrane. This creates an proton gradient that drives the synthesis of ATP.