Which is more common grass or humans?

Grass

Explanation:

Cause most human food comes from grasses, directly as grain or indirectly as feed for meat and dairy producing animals.

people- estimate that humans have modified >50% of Earth's land surface.

The grass family, Poaceae, is one of the largest plant families, and, to humans, perhaps the most important, as it includes agricultural grains such as wheat, rice, maize (corn), and sugar cane. The Poaceae comprise about 600 genera and perhaps ten thousand species. It is estimated that grasslands cover about 20 percent of the earth's land area.

so the answer is humans

it's anything that aren't producers and consumers.

explanation:

you've got to be clear on what "this" is

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.