PLEASE PLEASE PLEASE HELP I DONT UNDERSTAND 20 POINTS AND IF CORRECT PLEASE PLEASE PLEASE which diagram best shows how an enlightenment idea influenced

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

What is the main social system that existed in ancient china?

Which would make the best heading for this list of notes about the migration of african-americans during the reconstruction era?