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Explanation:
Letters are any of the 26 letters featured in the alphabet
Characters on the other hand can include all alphabetical letters however it DOES include symbols such as ,*/,?, etc. It can include numbers, underscores, dashes and emoticons as well.
Answer:
the sentence needs a punctuation mark
Explanation:
The sentence is made up of two clauses "Appearing almost like an alien planet," and "Edgar could see a huge grid of wind turbine in uniform rows and columns that stretched across the desert and the horizon." The second portion needs a period (or full stop). A period signifies where a sentence ends. Without a period, readers will be confused as they do not know where the sentence ends.
