Read the following paragraph and select the correct answer.

Writing is difficult because so many skills are involved. We must spell and form words correctly, and we must arrange sentences clearly. We must construct paragraphs logically, and we must pull paragraphs together so that they work to form a unified piece of writing. All these skills require frequent review, careful examination, and practice.

Identify the topic sentence of this paragraph.

Respuesta :

the third sentence is defiantly the answer 
The topic sentence to this would be the first sentence, "Writing is difficult because so many skills are involved". The reasoning for this is because the rest of the passage braches off into more detailed example of why writing is difficult because of the many skills involved. 
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