Final answer:
The correct answer is e. They are gifts from nature, not economic goods.
Step-by-step explanation:
The correct answer is e. They are gifts from nature, not economic goods.
Clear skies and clear rivers are examples of free goods, which are goods that are freely available in unlimited quantities and do not require any resources or effort to produce. They are natural resources provided by nature, such as clean air and water.
Unlike economic goods, which are goods that are produced and have a limited supply, clear skies and clear rivers do not need to be produced by workers and capital. Therefore, they are not considered scarce goods.