which statement best describes why the united states government can be called a representative democracy?
a)
people elect members of congress to make law
b)
all citizens debate issues and vote on the laws.
c)
power is shared between the nation and the states.
d)
division of power exists among the three branches.

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