The correct answer is oxygen gas and hydrogen ion to power up the ATP synthesis.
Explanation:
Photosystem II is the very initial link in the chain of process of photosynthesis. It traps photons and utilizes the energy to excite and release the electrons from water. These excited electrons are used when the electrons are released the water molecule is converted into oxygen gas, which bubble up to environment and hydrogen ions used to power up ATP synthesis.
Thus, the correct answer is oxygen gas and hydrogen ion to power up the ATP synthesis.
