Is it correct that the grass in the grass and sand of mountains, rivers, forests, fields and lakes is the producer in the ecosystem?

Yes According to the inquiry of senior high school biology textbooks, producer is an ecological term, which refers to an autotrophic organism that can be made of simple inorganic substances into organic substances. Grass in the grass and sand of mountains, rivers, forests, fields and lakes is the producer in the ecosystem. Producers include all green plants that carry out photosynthesis and some chemosynthetic bacteria.