The tone in Phillis Wheatley's poem was solemn. When Washington invited her to visit him in Cambridge, he used a friendly tone.
Do u want us to make a random sentence?
The correct answer is:
Everybody needs to call its parents.
Makes no sense. "Everybody" and "Its" are not in agreement.
All the sentences in a paragraph should be unified and coherent.
Answer: sentences
From the topic sentence to the concluding sentence, they need to be unified and coherent for the writer to truly get their point across as it was intended.
Hope this helps! :)