What was the main purpose of the Law of April 6, 1830? a. To protect Spanish rule of Mexico.

b. To end all trade between Texas and Mexico.

c. To block Mexicans from settling in Texas.

d. To control Texas colonists by preventing Anglo immigration into Texas.

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