what was the effect of the great oxidation ev...
what was the effect of the great oxidation event on nonliving things?\na. it led to the formation of gray bands in rocks when oxygen interacted with iron.\nb. it led to the formation of red bands in rocks after all of the oceans available iron compounds had reacted with oxygen.\nc. it caused populations to fluctuate because they were not used to the environmental conditions.\nd. it changed the chemical makeup of earths atmosphere.
Answer
# Answer:
D. It changed the chemical makeup of Earth's atmosphere.
# Brief Explanations:
The Great Oxidation Event added oxygen to Earth's atmosphere, altering its chemical composition. Options A and B are about rock - related effects but not the main effect on non - living things in a broad sense. Option C is about living populations, not non - living things.