Which statement describes how geologists use data from seismographs to learn about earthquakes?

they often compare information from all over the world.
they map the location of an e
arthquake’s focus.
they use one reading to determine the location of an epicenter.
they measure the difference between the arrival times of surface waves.

The statement which describes how geologists use data from seismographs to learn about earthquakes is ''They often compare information from all over the world''

Option A

Explanation:

A seismograph which is also known as the seismometer is an instrument which is used to detect earth quakes. The physical structure of this instrument is that it consists of a mass and a base which is attached to the mass and when an earthquake occurs, the base moves but the mass does not move. With the help of the seismographs, the geologists detect the exact location of the earthquakes but only after comparing the data from all over the world.

A

Explanation:

did the quiz

to protect the united states' role as a world leader, president truman wanted to prevent the soviet union from spreading communism beyond its post-world war ii boundaries. he declared that the united states must assist any nations struggling to prevent a communist takeover.

the answer is b.2008 and 2012 were presidential election years.