When a spider eats a mouse, what happens to parts of the mouse that are left over? A. They are eaten by scavengers or converted by decomposers into nutrients for the soil. B. They stay on the forest floor for a long time because there is not enough sunlight for them to decompose. C. They are washed away by the daily rains that drench the ecosystem. D. They blow away in the breezes that sweep across the forest floor.