Question

You have been asked to write an essay about the chemical process of fire. Which of these is the most effective topic sentence for a paragraph in this essay?One of the three elements that are required for fire to burn is oxygen.Flames are the part of a fire that can be seen, and depending on the material being burned, they can be different colors.Campfires left unattended can have significant consequences, such as forest fires.There are three reasons why fire is important to the development of mankind: warmth, protection, and cooking.

Answer 1

Answer: "One of the three elements that are required for fire to burn is oxygen."

Step-by-step explanation:

This topic sentence introduces the reader to one of the key components necessary for fire to occur, which is oxygen. It sets the stage for a paragraph that would likely explain the role of oxygen in the chemical process of fire and how it supports the combustion reaction.

I hope this helps :)