Question

which organism is not a consumer?
owl
grass
snake
bacteria

Explanation:

Consumers are organisms that obtain energy by eating other organisms. Producers make their own food via photosynthesis/chemosynthesis, while decomposers break down dead matter. Grass is a producer that makes its own food using sunlight. Owls and snakes are animals that eat other organisms (consumers), and most bacteria act as decomposers or consumers, not producers.

Answer:

B. grass