How many people are going to be at work tomorrow morning please
<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>
It mean he used fact and knowledge or scientific studies to back up the writing
the answer c. such as would work best in the sentence.
It goes out because the man's hands are too frozen to tend it