Natural resources a. are inputs provided by nature. b. include land, rivers, and mineral deposits. c. take two forms: renewable and nonrenewable. d. All of the above are correct.

Answer: d. All of the above are correct.

Explanation: Natural resources are resources provided by nature. They occur in nature without manmade interference. Natural resources include mineral deposits, land water bodies and the atmosphere. These resources are utilized by man for economic, social and educational purposes. Natural resources can be renewable or nonrenewable resources such as water are renewed by rainfall. Heavy manmade activities such as industrialization, war or natural disasters can deplete these resources.