As the name implies, it refers to organisms that can make organic matter from inorganic substances.

Because all living things except producers can only use ready-made organic matter.

For example, people can't convert carbon dioxide into sugar for their own breathing.

Plants and some microorganisms can (including the green-eyed worms of animals, which may be extended by the compulsory teacher), so they are also called autotrophs.

Most producers use solar energy and a few use chemical energy.

Such as plants and chemotactic bacteria (iron bacteria, sulfur bacteria, etc. )

* * * is characterized by the use of inorganic and organic substances.

From the above characteristics, it is defined that "producer is an organism that can use inorganic substances", so "producer is an autotrophic organism" and "autotrophic organism is a producer"