Will mark brainliest if someone answers my 2 last questions there both history

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

Identify whether each scenario describes a drawback of an advantage of trade regulation. benefits of trade regulations

Yugoslavia a: nato b: warsaw pact c: not a member of either alliance