How did the appearance of photosynthetic organisms affect the evolution of life on earth?

Photosynthetic cyanobacteria reengineered the planet. Photosynthesis led to two more singularities - plants and animals appeared. Atmospheric oxygen resulted from a change to a microbe's metabolism that evolved once, at a specific time in the earth's history

it is prolly d and c and f

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.