Tertiary means 3rd. So why is it the fourth link? give explanation for brainliest if 2 people answer

answer; ///i do believe that the correct answer is (b); ///to inform, entertain or persuade an

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.