Questions: Multiple Choice Question Why is it important to study prehistoric earthquakes? Modern earthquakes are all much smaller than prehistoric earthquakes and cannot provide details about larger seismic events. We can determine the recurrence intervals and likely size of earthquakes to help people create a regional plan for future seismic events. There are no modern earthquakes to study, so prehistoric earthquakes are the only ones that may provide data to scientists. They provide the most accurate data from seismometers and therefore the best seismographs.

The answer is the second one: We can determine the recurrence intervals and likely size of earthquakes to help people create a regional plan for future seismic events.

Explanation for each option:

1. Modern earthquakes are all much smaller than prehistoric earthquakes and cannot provide details about larger seismic events.
   This statement is incorrect. Modern earthquakes can be quite large and provide valuable data. The size of an earthquake is not necessarily smaller in modern times compared to prehistoric times.

2. We can determine the recurrence intervals and likely size of earthquakes to help people create a regional plan for future seismic events.
   This is the correct answer. Studying prehistoric earthquakes helps scientists understand the patterns and frequencies of seismic activity over long periods, which is crucial for assessing risks and preparing for future events.

3. There are no modern earthquakes to study, so prehistoric earthquakes are the only ones that may provide data to scientists.
   This statement is incorrect. Modern earthquakes occur frequently and provide a wealth of data for scientists to study.

4. They provide the most accurate data from seismometers and therefore the best seismographs.
   This statement is incorrect. Prehistoric earthquakes do not provide data from seismometers, as these instruments did not exist in prehistoric times. Modern earthquakes provide the most accurate data from seismometers.

In summary, studying prehistoric earthquakes is important for understanding the long-term patterns and potential future risks of seismic activity, which aids in regional planning and preparedness.