Question

earths early atmosphere is inferred to have been formed during the early archean era primarily by
1 asteroid impacts
2 coal - forming forests
3 radioactive decay
4 volcanic outgassing

Explanation:

During the Early Archean Era, Earth's early atmosphere was mainly formed by volcanic outgassing. Volcanic eruptions released gases like water vapor, carbon dioxide, and nitrogen. Asteroid impacts mainly affected the surface in other ways. Coal - forming forests appeared much later. Radioactive decay is related to heat generation in the Earth's interior rather than early atmospheric formation.

Answer:

1. volcanic outgassing