<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 emphasizes the idea that the disappearance of humans will not sadden animals.
Answer: gently
Explanation: an adverb is a word that serves as a modifier of a verb, an adjective, another adverb, a preposition. so in this case the adverb "gently" is modifying the verb "touch".
At
There is an entire song to remember the prepositions, if you can sing it to the Yankee-doodle song you should be able to remember them!
Above, Across, After, Against, Along, Among, Around, At
Before, Behind, Below, Beneath, Beside, Between, Beyond, By
During, For, From, In, Into
Of, On, Over, Through, To
(There's a few more lines but I learned this song in the fourth grade so this is where I go blank. But you can at least learn more than you know for now! Song association makes everything easier to memorize!)<span />
