Human capital is the knowledge and skill that the worker possesses. Entrepreneurial Ability the talent needed to think up new methods or products to make a good or service better. Goods are things that we can see, feel, touch, etc. They are tangible. They are hot dogs, paper towels, cars, CD s, etc.
Services are intangible.
We see the outcome of the resources. They are haircuts, tax preparation, medical treatment, etc. When the amount of people that want the item exceeds the amount of items available if the price was at zero. The price for clean air comes at a price to factories and companies. Ultimately this cost is pasted to consumers.