The main function of chloroplast is to:

To conversion of light energy into chemical energy stored in organic compounds (sugar).

Use light energy to make food for plant cells

Explanation:

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.

did you fail the test? xd