WILL MARK BRAINLIEST. Which gas became part of Earth's atmosphere as a result of the evolution of life-forms?

a. Oxygen
b. Nitrogen
c. Helium
d. Hydrogen

Earth's atmosphere was largely made up of nitrogen and carbon dioxide gases. After photosynthesizing organisms multiplied on Earth's surface and in the oceans, much of the carbon dioxide was replaced with oxygen.

Idk if this helps but plz mark brainliest if it does

graph question answered .. you think better when you are relaxed and happy

conservation of mass

mass before something happens = mass afterwards