Passage: 'Mount Merapi in Central Java is one of the most active volcanoes in Indonesia. It has erupted regularly for centuries, and thousands of people live on its fertile slopes because volcanic ash enriches the soil for farming. Authorities monitor the volcano continuously and set alert levels so that villagers can be evacuated when danger increases. Despite the risk, many families choose to return because their farms and homes are there.' What do authorities do to protect villagers?
Answer and explanation
Correct answer: A. Monitor the volcano and set alert levels
The passage describes monitoring and alert levels for evacuation.
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