First sentence: Why this is the first line? This paragraph is the first sentence because it introduces the main topic of preparing for a journey. It sets the stage for what needs to be done before traveling. It does not refer to any previous information. Why other lines are not chosen? Paragraph 2 starts with 'Selecting', which is not independent. Paragraph 3 starts with 'Compiling', which is also not independent. Paragraph 4 starts with 'Packing', which is not independent. Paragraph 5 starts with 'Lastly', which shows it is not the first sentence.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it wraps up the topic of preparation for a journey. It provides a final important point about safety.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 logically connects with Paragraph 1 because it continues the theme of preparation before a journey. It follows a logical order of steps to take before traveling.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects with Paragraph 2 because it follows the planning stage. After planning the route, making the drive enjoyable is the next step.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects with Paragraph 3 because it continues the idea of preparation. After making the drive enjoyable, packing essentials is another important step.
• Pair 4 (Paragraph 4 → Paragraph 5): Paragraph 5 connects with Paragraph 4 because it concludes the preparation process. After packing, informing someone about your plans is a final safety step.