Earth's early atmosphere was shaped initially by which of the following?

Outgassing of Volcanoes

Explanation:

Earth's atmosphere developed during geological era. Earth; s atmosphere composed of methane, neon, helium, water vapour and ammonia but it lacks oxygen the life saving gas. Earth's early atmosphere is formed by the eruptions of volcanoes which emit various gases and these gases accumulated above and formed a atmosphere. The components of early atmosphere is mainly gases.