Question

which is required for the light - dependent reactions in photosynthesis to occur?
h₂o
atp
nadph
co₂

Explanation:

In the light - dependent reactions of photosynthesis, water (\(H_2O\)) is split. This process provides electrons for the electron transport chain, protons (\(H^+\)) for the formation of a proton gradient (which is used to make ATP), and oxygen (\(O_2\)) as a by - product.
ATP and NADPH are products of the light - dependent reactions. They are used in the light - independent reactions (Calvin cycle). \(CO_2\) is used in the light - independent reactions of photosynthesis.

Answer:

\(H_2O\)