Question

scientists theorize that the original atmosphere of earth was stripped away by the solar wind shortly after the formation of the planet. the jovian planets are far enough from the sun that the solar wind has less of an impact. studies of the jovian planets suggest the early atmosphere of earth was mainly composed of two gases. select those two gases below. carbon dioxide helium hydrogen oxygen water vapor

Explanation:

The early atmosphere of Earth is thought to have been mainly composed of hydrogen and helium, which were abundant in the early solar - system and were the initial gases that accumulated around the newly formed Earth. These gases were later largely lost due to the solar wind.

Answer:

helium, hydrogen