What were the two main reasons for the decline of the byzantine empire? 1)civil wars 2)conversion to christianity 3)invasions 4)plagues 5)riots at the hippodrome

Which best explains parallel forces?

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

Did the west show signs of cultural decline in the 20th century?