The water splitting step of photosynthesis is called:

Explanation

The correct answer is Photolysis. Photolysis refers to the light-dependent splitting of water molecules into hydrogen ions, oxygen, and electrons. This process occurs during photosynthesis and is crucial for providing the electrons needed for the synthesis of ATP and NADPH. The other options are incorrect because:Hydrolysis refers to the general process of breaking bonds using water, not specifically related to light-dependent reactions.Chemiosmosis is the process of generating ATP through the movement of hydrogen ions across a membrane, not the splitting of water.Photosynthesis is the general term for the process of converting light energy to chemical energy, which includes photolysis as one of its steps, but it is not specifically the water-splitting step.