Which process requires energy for a nonspontaneous redox reaction to occur? electrolysis?

Below diagram provides an example of non-spontaneous electrochemical reaction. In the attached example, NaCl is dissolved in water. Na may be deposited at cathode, and Cl2 must be evolved at anode. 

However, this process is non-spontaneous in nature. 

Non-spontaneous reaction are one which does not occur on their own and external source of energy is required for reaction to occur.

Such reactions are referred as electrolysis.

Hi. where is the graph?

Mass of water is smething that you froma drug test or sum girl ya