Producer refers to a kind of organism that can synthesize inorganic matter into organic matter, so it must be autotrophic. Decomposition refers to an organism that decomposes organic matter into inorganic matter, so it must be heterotrophs. Some creatures can be both producers and consumers, such as Nepenthes.

Producer refers to green plants, which can carry out photosynthesis, convert solar energy into chemical energy and inorganic matter into organic matter, not only for their own growth and development, but also for other biological groups to provide food and energy. There are also some autotrophic microorganisms that can transform inorganic substances into organic substances through chemical action. Although the amount of organic matter synthesized by them is small, it is of great significance to the natural circulation of matter.

Characteristics of autotrophs The obvious characteristic of autotrophs is that they can synthesize organic matter for their own life activities without consuming ready-made organic matter. At the same time, it provides a large amount of organic matter for consumers (organisms that can't synthesize organic matter by themselves, but can only maintain their own life activities by consuming ready-made organic matter) and decomposers (organisms that need to decompose organic matter to maintain their own life activities).