<span>Lightning rods are a necessity for radio towers and skyscrapers.
This is the topic sentence, because it's clear from this that the paragraph will discuss lightning rods and why they are necessary for radio towers and skyscrapers to have. It is broad enough to open the paragraph but also specific enough to give preview and some detail. </span>
Hello. You did not provide the excerpt to which this question refers and did not enter answer options, which makes it impossible for me to answer your question.
However, to find out which of the answer options show the main claim of the passage first, you must read the entire passage and understand what the main topic being discussed is. The theme is the main claim of the passage and among the answer options, the one that represents this theme is the sentence that answers your question.
I hope it helped you.
The sentence from the passage that supports the phrase "the world is chiefly indebted" to james watt and george stephenson for the steam engine is Watt made it a quick, powerful, and efficient engine, requiring only a fourth as much fuel as before.
<h3>What is a sentence?</h3>
A sentence refer to group of words that have a subject and predicate which passes meaningful information and also comprises of noun and verb.
Therefore, The sentence from the passage that supports the phrase "the world is chiefly indebted" to james watt and george stephenson for the steam engine is Watt made it a quick, powerful, and efficient engine, requiring only a fourth as much fuel as before.
Learn more about sentence below.
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Where are the answer choices
Answer: dog
Explanation: If it were "dogs" then there would be no "s" at the end of "follows".