Which of these best represents an ecosystem?
A.) A herd of deer grazing in a field
B.) Mushrooms decomposing organic matter
C.) A pitcher plant growing in nutrient-poor soil
D.) Frogs and fish swimming in a pond in the forest
A.) A herd of deer grazing in a field
B.) Mushrooms decomposing organic matter
C.) A pitcher plant growing in nutrient-poor soil
D.) Frogs and fish swimming in a pond in the forest