The ATP synthesis in plants during the ETC is called?

Explanation

During the light-dependent reactions of photosynthesis, ATP is synthesized through a process called chemiosmosis. This involves the movement of protons across the thylakoid membrane, which generates a proton gradient. ATP synthase then uses this gradient to synthesize ATP from ADP and inorganic phosphate. While photophosphorylation is the overall process of ATP formation using light energy, chemiosmosis specifically describes the mechanism within the electron transport chain that produces ATP. Photolysis is unrelated to ATP synthesis as it involves the breakdown of water. Therefore, the correct answer is chemiosmosis.