In the production of ATP in photosynthesis, energy from electron flow is used to transport from the to the thylakoid compartment, generating a concentration gradient of .

Explanation:

ATP is produced in the process of photosynthesis occurs in plants and many other organisms. Electron are transported  by electron transport chain and there is the generation of concentration gradient of H+.

This gradient causes the activation of ATPase pump which causes the production of ATP by using this gradient.

In the production of ATP in photosynthesis, energy from electron flow is used to transport H+ from the stroma to the thylakoid compartment, generating a concentration gradient of H+.

explanation:

on disadvantage of hydroelectric power is the cost. another disadvantage of using hydroelectric power is finding a water source powerful enough to harvest hydroelectric power.

i think that c)gold was found there

but i am not sure