Answer:
The cow is a Primary Consumer since it feeds off the Grass.
The grass is a Producer since it's an autotroph (Can make its food through Photo synthesies. )
The Mushroom is a decomposer since it's a fungus.
And lastly, the man would be a Tertiary consumer since most of us are omnivores.
It would be A. NADH -- electron carrier
Both use the scientific method to an extent and are a way of scientific exploration.
Try researching the discovery of microscopes and their impact on scientific discoveries, including cells!!!
