The location of the center of our galaxy was first determined by observations of select one: a. the sun. b. black holes. c. the motions of nearby stars. d. the spiral arms. e. globular clusters

The location of the center of our galaxy was first determined by observations of globular clusters.

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true. earthquakes are felt whenever there is a slip around a fault in the rocks below the earth. this reorientation of faults create sesmic waves and is known as earthquake, the severity of which is measured in richter scale. these are more prominent in hilly regions as the rocks usually form faults to balance the pressures on it.