During the light reactions, the pigments and proteins of photosystem ii use light to send energized electrons through an electron transport chain, ultimately producing (a form of energy). a molecule replaces the lost electrons, producing the byproduct .

The correct answer will be

1. ATP molecules

2. Water molecule

3. Oxygen

Explanation:

The light reaction is one of the two phases of the complex process of photosynthesis, which converts the light energy to the chemical energy in the form of ATP and NADPH. These chemical are utilized in the dark reaction.

The light reaction requires two photosystems in which photosystem II begins the process by trapping the photons of light by chlorophyll which excites the electron. The excited electron jumps and reaches the reaction centre where it enters the electron transport chain. The electron transport chain leads to the generation of the electrochemical gradient which helps the formation of the ATP molecules.

The movement of an electron creates a resonance effect which causes the splitting of the water molecule which releases the electrons and the oxygen atom.

Thus, ATP molecules, Water molecule and Oxygen are the correct options.