Why is water important to photosynthesis?
a. the splitting of water replaces the electron in photosystem ii
b. the splitting of water replaces the electron in the calvin cycle
c. the formation of water donates an electron to the electron transport chain
d. the formation of water donates an electron to nadh

c. The formation of water donates an electron to the electron transport chain

Explanation:

The electron transport chain results in the synthesis of water, being an electron flow through a chain of O2 to H2O-reduced transporters, with electrons being fed by FADH2 and NADH (formerly reduced in the Krebs cycle are now oxidized). Therefore, we can conclude that water is important for photosynthesis because water formation donates an electron to the electron transport chain.

The electron transport chain is a set of reactions that occurs in mitochondrial ridges in animal cells and occurs in chloroplasts in plant cells, and provides energy for another process, oxidative phosphorylation. Electron conveyor chain and oxidative phosphorylation are therefore related, or rather coupled, events. However, each can occur independently and has different components and products.

im not intirely sure but i think the anwser is d relative humidity