Concept:Energy sources are classified into renewable (can be used again and again) and non-renewable (get depleted after use).Explanation:Wind energy is a renewable source because it is naturally replenished and does not get exhausted after use.Coal, petroleum, and natural gas are non-renewable sources.They are formed from fossils over millions of years and get depleted after one-time use.These resources cannot be replaced quickly within a human lifetime.Thus, wind energy is the odd one out as it belongs to a different category.Answer:D. Wind energy