Question

which organism provides energy to all other organisms in this ecosystem?
prairie grass
coyote
vulture
prairie dog

Explanation:

In ecosystems, producers (plants) capture sunlight energy via photosynthesis, forming the base of the food web. All other organisms (consumers, decomposers) rely directly or indirectly on producers for energy. Prairie grass is the only producer in the given food web, while coyotes, vultures, and prairie dogs are consumers.

Answer:

prairie grass