what's a good topic sentence and conclusion for why do they call oil and natural gas fossil fuels?
Your topic sentence and conclusion depends upon what you say in between.
three reason and explanations why oil and natural gas is called fossil fuels?
A good topic sentence for explaining why oil and natural gas are called fossil fuels could be: "The term 'fossil fuels' is used to describe oil and natural gas due to their formation from ancient organic remains and the extensive time required for their creation."
To develop a solid conclusion, you can summarize the main points discussed in the explanation. Here's an example: "In conclusion, oil and natural gas are referred to as fossil fuels because they are formed over millions of years from the decayed remains of ancient plants and animals. Understanding the origin of these resources helps us comprehend the significance of adopting sustainable energy alternatives to avoid the depletion of non-renewable fossil fuel reserves."
Remember, using this starting point, you can customize and adjust the topic sentence and conclusion to fit your style and purpose.