Answer: A product is a raw material used to finished a good.A commodity is a finished good, already sold for people.
Explanation: A product and a commodity are normally confused by people, but the are different, while one is a raw material the other is the finished good.
Commodities can be in a easy way be substituted for another one.
When the Zebra arrived they ate all the food so the Unionid mussels declined as they died from the lack of food. Causing the Zebra Zebra numbers to increase and Unionid numbers to decline.