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 the decrease in size of lakes due to climate change. This is a general statement that sets the stage for the following paragraphs. It does not use any pronouns or definite articles that refer to previous information. 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 "The surface area" which uses the definite article "the". This means it refers to something already known. Paragraph 3 starts with "In this case" which suggests it needs more context. Paragraph 4 starts with "If the lake" which also needs prior information. Paragraph 5 starts with "Hopefully" which is not a general statement.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it wraps up the ideas presented in the text. It suggests a hopeful solution to the problems discussed earlier. It uses the word "hopefully" which indicates a conclusion or final thought.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects with Paragraph 1 because it gives a specific example of the general statement in Paragraph 1. This follows the Broader to Specific Strategy. The first paragraph talks about lakes in general, and the second paragraph talks about one specific lake.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects with Paragraph 2 because it explains the reasons for the crisis mentioned in Paragraph 2. This follows the Logical Order strategy. The second paragraph talks about the lake's decrease, and the third paragraph explains why this is happening.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects with Paragraph 3 because it discusses what needs to be done to save the lake. This follows the Cause and Effect Relationship strategy. The third paragraph talks about the causes of the crisis, and the fourth paragraph talks about the actions needed to address it.
• Pair 4 (Paragraph 4 → Paragraph 5): Paragraph 5 connects with Paragraph 4 because it suggests a solution to the problem discussed in Paragraph 4. This follows the Topic Example strategy. The fourth paragraph talks about the need for plans, and the fifth paragraph talks about how awareness can help.