A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it introduces the main topic of the text. It talks about aspiring artists and their interest in landscape painting. This is a general statement that sets the stage for what follows. It does not refer to any previous information, so it is independent. Why other lines are not chosen? The other paragraphs are not chosen because they do not meet the criteria for being independent. For example, Paragraph 2 starts with "Consequently," which is a conjunction. This means it connects to something before it. Paragraph 3 starts with "Hours of practice follow," which also suggests it needs earlier context. Paragraph 4 uses "The mastery of landscape painting," which assumes prior knowledge of the topic.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it wraps up the text. It talks about the final achievement of the artists, which is having a personal exhibition. This shows the overall theme of growth and success in landscape painting.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects to Paragraph 1 because it shows what the artists do after they become interested in landscape painting. The word "Consequently" is a connector that shows the result of their fascination. This follows the Logical Order rule.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects to Paragraph 2 because it explains what happens after the artists get the right tools. They practice more. The phrase "Hours of practice follow" shows a clear sequence of events, following the Chronological Order rule.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects to Paragraph 3 because it describes the outcome of all the practice. After learning techniques, the artists reach mastery. The phrase "is often marked by" shows a logical progression from practice to achievement, following the Logical Order rule.