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Option 2: "Physical geography uses many other sciences."
Explanation: This option is correct as the text explicitly states that physical geography uses ideas from other sciences such as chemistry, biology, climatology, and astronomy. This aligns perfectly with the main idea presented in the text.
Option 1: "It is the study of the universe."
Explanation: This option is incorrect because the text specifies that physical geography is a science about the Earth, not the universe. The focus is on Earth sciences, which is a narrower scope than the universe.
Option 3: "Many other sciences use it to combine their ideas."
Explanation: This option is incorrect because the text does not mention that other sciences use physical geography; rather, it states that physical geography incorporates ideas from other sciences. This is a misinterpretation of the relationship described.
Option 4: "Energy is the biggest subject of physical geography."
Explanation: This option is incorrect as the text does not indicate that energy is the biggest subject of physical geography. It mentions energy as part of the examples but does not elevate it above other topics or suggest it is the primary focus.
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