Multiple choice Which of the following are natural resources? Air, wind, fire, water Climatic, topographic, edaphic, biotic resources Land, forests, water, minerals, energy Carbon dioxide, oxygen, nitrogen, ammonia, methane Reveal answer Fill a bubble to check yourself C Correct answer Explanation Natural resources are materials or substances that occur in nature and can be used for economic gain. Land, forests, water, minerals, and energy sources are the standard categories of natural resources.