Answer:
The correct answer is and hydrogen ion to for ATP synthesis oxygen gas.
Explanation:
Photosystem II is the very initial and essential link in the chain of photosynthesis. The reaction center of this photosystem traps photons and utilizes the light energy to excite and release the electrons from the water molecule.
These excited electrons are used to break down water and converted it into oxygen gas, and hydrogen ions used to power up ATP synthesis.
Thus, the correct answer is and hydrogen ion to for ATP synthesis oxygen gas.