This first step is to write a topic sentence. This could be a question or statement that you will answer or explain in the balance of the essay. The other sentences in the first paragraph open up the topic and can be 3-4 sentences. (60-90 words) This first step is to write a topic sentence. This could be a question or statement that you will answer or explain in the balance of the essay. The other sentences in the first paragraph open up the topic and can be 3-4 sentences. (60-90 words)