Questions 11 to 13 are based on. the following passage.At the end of the passage, you will be given 15 seconds to answer the questions. Now, listen to the passage.
In this passage, what does the term "coalescence" refer toA．The gathering of small clouds to form large clouds. B．The growth of droplets. C．The fall of raindrops and other precipitation. D．The movement of dust particles in the sunlight.
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