Question

energy sources that do not run out or that can be replaced by new growth are also known as which of the following? a. fossil fuels b. ethanol c. unsustainable d. renewable

Explanation:

• Fossil fuels (A) are non - renewable. They take millions of years to form and will run out.
• Ethanol (B) is a biofuel. While it can be produced from renewable sources (like corn), the key definition here is about the general energy source type.
• Unsustainable (C) means not able to be maintained at a certain rate or level, which is the opposite of what the question is asking.
• Renewable (D) energy sources are those that do not run out (like solar, wind) or can be replaced by new growth (like biomass).

Answer:

D. Renewable