Organic compounds are those compounds that are carbon based. Most carbon based compounds are organic. Organic compounds are composed of gas, liquid and other solid compounds, this all contains carbon. Methane is one of the simplest organic compounds. Organic compound are classified into various ways. The natural compounds that usually came from the plants and animals, the biotechnology came from the industrially manufactured organisms like yeast and bacteria, and the synthetic compounds produced from other compounds, it does not occur naturally.