a can be defined as whatever people use to create services and goods.\nproduct\nresource\nvalue\ncost

a can be defined as whatever people use to create services and goods.\nproduct\nresource\nvalue\ncost
Answer
Brief Explanations:
Resources are what people utilize to create services and goods. A product is the end - result, value is related to worth, and cost is about the expense.
Answer:
resource