Photoautotrophic: this is the type of plants and some autotrophic bacteria with pigments, such as green S bacteria. They use inorganic CO2 as C source and light energy as energy, thus synthesizing their own organic matter.

Chemotactic autotroph: An organism, such as nitrifying bacteria, uses inorganic CO2 as a carbon source to oxidize inorganic substances to generate energy, thus synthesizing its own organic matter.

Photoenergy heterotrophy: this kind of organism is relatively rare, which refers to the organism that uses organic matter as C source and light energy as energy to synthesize organic matter.

Chemotaxis-heterotrophy: This is the nutrition mode of most animals and bacteria, which uses organic matter as C source and energy to synthesize its own organic matter.