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Read the passage below: Before the invention of the telegraph in 1837, transmitting information across long distances took days or even weeks by horse or ship. Samuel Morse revolutionized long-distance communication by sending electrical pulses over wire lines. By encoding letters into short and long signals (dots and dashes), messages could travel hundreds of miles in seconds. Which sentence best summarizes the main idea of the passage?

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Read the paragraph below: Biomimicry is an engineering discipline that solves human design challenges by emulating nature's time-tested patterns. For example, the high-speed Japanese Shinkansen bullet train was redesigned after engineers noticed that the kingfisher bird dives smoothly into water without creating a splash. By reshaping the train's nose to resemble a kingfisher's beak, engineers reduced noise pollution and cut electricity usage by 15%. How does the example of the bullet train support the concept of biomimicry?

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