The Factor that makes predicting a volcanic eruption difficult is : ( B ) All of these
Many volcanoes erupt once every one or two centuries, therefore it can be difficult to monitor all these volcanoes simultaneously, also financial constraints leads to unavailability of adequate data to monitor volcanoes, and not every magma movement leads to a volcanic eruptions as some volcanoes have one seismometer
Therefore we can conclude that The Factor that makes predicting a volcanic eruption difficult is : ( B ) All of the options listed in the question
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