I Develop and Use Your Model
1. SEP Develop Models Use the space to draw a model of the combustion of iron
to form iron oxide. As you develop your model, consider the following:
• Your model should show the reactants and the products.
Your model should show all the atoms involved in the reaction and the
movement of electrons.
• Your model should include the system in which the reaction occurs.

Ibelieve it is b. proton.hope my answer has you : )

Answerthe half-reaction having the greatest tendency to occur at the anode:     i₂(aq) + 2e⁻  ⇄ 2i⁻  ;   e = +0.53 v======oxidation occurs at the anode. we must therefore find the half-reaction with the greatest tendency to oxidize.the given values of e are reduction potentials (the form of the half-reactions are of reduction).the lower the reduction potential, the higher the potential to oxidize. the half-cell with the lowest reduction potential will have the greatest tendency to oxidize at the anode.the half-reaction having the greatest tendency must be    i₂(aq) + 2e⁻  ⇄ 2i⁻    e = +0.53 vbecause its reduction potential is the lowest out of the three.

It's called the falling actionwrong subject by the way