Answer: C, student 3
Explanation: Mold decomposes the bread(eats it), Koalas consume food, Mushrooms decompose, and Oak, being a tree, produces oxygen using the sun. Think of producers as mostly plants, where they produce energy from the sun. Then those consumers eat the plants, such as koalas eating leaves. Then the decomposers, molds and mushrooms, come in and eat the producers once they die.