Which of the following statements best explains why earthquakes occur more frequently in California than in Massachusetts?
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California is located on the boundary of two crustal plates, but Massachusetts is not.

Food webs show feeding relationships among different types of organisms. Those organisms each have a specific niche. Which of the following best describes a function of decomposers in food webs?
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to recycle nutrients into soil

Which form of energy are x rays and ultraviolet light?
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electromagnetic