A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it introduces the main topic. It talks about Gallaudet and his connection to the Cogswell family. This is important because it sets up the story about education for deaf people. It does not use any words that need prior context. Why other lines are not chosen? Paragraph 2 starts with 'Gallaudet went to Europe,' which needs context about who Gallaudet is. Paragraph 3 starts with 'In 1817,' which is a specific time and assumes prior knowledge. Paragraph 4 starts with 'This school aimed,' which refers to a school that is not yet introduced.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it wraps up the main idea. It summarizes the purpose of the school and reflects the overall theme of education for deaf students.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects with Paragraph 1 because it continues the story of Gallaudet. The logical order shows how Gallaudet's search for methods leads him to Europe.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 follows Paragraph 2 because it shows the result of Gallaudet's journey. The chronological order shows that after learning about methods, he helped open a school.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects with Paragraph 3 because it explains what the school does. The topic example rule shows that the second paragraph gives details about the school mentioned in the first.