Correct Answer:
Producer
Step-by-step explanation:
Consumer is the one who buys the product and uses it. In this case consumer will be the friend.
Producer is the one who makes, builds or manufactures something and sell it to someone. According to the given example, if I make a cake and my friend buys the cake from me, I am the Producer.
Purchaser is the one who purchases the product. So the friend will also be a purchaser in this case.
Commodity is the raw material or the basic goods that can be sold.
So, the best answer to this question is producer.