PLEASE HELP Select the correct answer from each drop-down menu.

Which transitions show the correct relationships?

Global Warming and Its Causes

Global warming is a result of an increase in greenhouse gases. Greenhouse gases are released into the atmosphere (In spite of/ even though/ until now/ as a result of) deforestation and combustion of fossil fuels. Deforestation is a major contributor to global warming. Forests help to maintain the levels of oxygen in the air that make it possible for us to survive. (Although/ yet/ though/ additionally), there has ben a surge in the levels of carbon dioxide in the air (due to/ even as/ comparatively/ instead of) the depletion of vast stretches of forests. (While/ similarly/ since/ ordinarily), other factors, such as the release of CFCs from the refrigerators and pollutants from industries into the atmosphere, are also responsible for global warming.