A hydrograph shows: Multiple Choice the change in a river's discharge over time. the length and width of a river. the beginning and ending elevations of a river. the change in the sediment load of a river.

The answer is it can create volcanoes .

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Answera discharge of static electricity;

Historians are researchers of the past or people who understand the history of people. with this field, they must possess qualities such as being unbiased, patient, efficient reader, has a knack for logic and critical thinking and reasoning, disciplined, open-minded, resourceful, with good analytical ability, good reasoning skills and problem solving!