The author uses the phrase "is written in" (line 6) most likely to reinforce the idea that the evidence is there and can be interpreted by scientists.
The correct option is D.
Volcanic eruption -
- Lines 5-8 state that "layers of sulfate deposits and tiny shards of volcanic glass are recorded in polar ice cores, indicating that a massive volcano erupted somewhere in the planet, presumably in the Middle Ages."
- The use of the word "is written in" furthers the concept that the polar ice caps have proof of the volcanic eruption, and that scientists may interpret this proof by looking at the "sulfate deposits and microscopic shards of volcanic glass."
- Choices A, B, and C are inaccurate because the author does not use the word "is written in" to illustrate the idea of the practical aspect of the scientists' job, emphasize how frequently scientists write about their work, or stress the emphasis scientists place on their work.
What is the term Little Ice Age?
The time span between 1400 and 1900, marked by the growth of mountain glaciers and a global dropping of temperatures, particularly in the Alps, Scandinavia, Iceland, and Alaska.
Learn more about Little Ice Age
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