How do the changes in atmosphere composition throughout earths history illus trade the Gaia hypothesis?

The changes in atmosphere composition throughout Earth's history, such as an increase in oxygen levels due to photosynthesis by early life forms, can be seen as evidence supporting the Gaia hypothesis. This hypothesis suggests that Earth's biOSphere interacts with the atmosphere, oceans, and geology to maintain conditions conducive to life. The evolution of life on Earth has influenced the composition of the atmosphere, creating a self-regulating system that promotes the habitability of the planet.