metabolic production of methane production of nitrates from inorganic nitrogen aerobic breakdown of sugars to release energy transformation of light energy into chemical bond energy
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: The types of organisms on Earth changed as a result of increased levels of atmospheric oxygen. Which process contributed to this buildup of oxygen in Earth's atmosphere?
Possibilities:
- metabolic production of methane
- production of nitrates from inorganic nitrogen
- aerobic breakdown of sugars to release energy
- transformation of light energy into chemical bond energy

transformation of light energy into chemical bond energy