The correct answer is Oxygen and carbon dioxide.
Oxygen is termed as chemical element. It is the third most abundant element which is found in the universe and helium and hydrogen.
Dioxygen where pressure and temperature atoms ate bindend, is used in cellular respiration and living organisms which contains oxygen. For example, fats, carbohydrates and nucleic acid.
Carbon dioxide is the colourless gas. It consists of carbon atom which covalently doubles bindend to two oxygen atoms. Atmospheric carbon dioxide is the primary carbon source which is for life on earth.
Cyanobacteria, plants and algae use light energy to photosynthesize carbohydrate which is from water and carbon dioxide and oxygen. Carbon dioxide is being produced by aerobic organisms this is when lipids and metabolize carbohydrates and produces energy which is for respiration process.