First sentence: Why this is the first line? This paragraph is the first line because it introduces the main topic of the text. It talks about the global market and the lifespan of products. This sets the stage for the discussion about e-waste. It does not use any specific references or pronouns that need prior context. Why other lines are not chosen? Paragraph 2 starts with "The current global production..." which uses the definite article "the" and assumes prior knowledge. Paragraph 3 starts with "In Europe..." which is specific and does not stand alone. Paragraph 4 starts with "Developing countries..." which also assumes prior context. All these reasons make them not independent.

Concluding sentence: Why this is the last line? This paragraph is the last line because it wraps up the discussion about e-waste. It gives a final point about future expectations for developing countries. This summarizes the overall theme of the text.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects to Paragraph 1 because it follows the topic of the global market. The expansion of the market leads to more e-waste production. This shows a logical order of ideas.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects to Paragraph 2 because it gives more specific information about e-waste in Europe. This is a broader to specific strategy, where the general production leads to specific details about Europe.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects to Paragraph 3 because it shows a contrast. While Europe has increasing e-waste, developing countries are expected to produce even more. This is a contrast strategy.