Which was the better city-state in ancient Greece, Athens or Sparta?

What would lead a historian to consider two events to have a relationship of correlation rather than causation

Marine exptoration of oil uses seismic waves to locate oil in the seabed. what is a negative impact from seismic waves on the aquatic ecosystem of the ocean? a.seismic waves kill microoganisms b.seismic waves disrupts the sand and causes seafloor erosion c.seismic waves have virtually no adverse affects on marine life d.seismic waves damage the sonar that dolphins and whales use to orient themselves underwater

Which option best describes how the printing press transformed european society? (a) prior to the printing press, the catholic church hand-copied texts and disseminated them to peasants. (b) prior to the printing press, the church of england did not allow peasants to learn to read. (c) prior to the printing press, the orthodox church recited luther’s “95 theses” aloud to peasants. (d) prior to the printing press, knowledge was reserved primarily for nobles and clergy.