Why did early native americans most likely irrigate their crops?
a. water could only be found in arroyos in the southwest?
b. they knew that european crop yields were high and wished to imitate european farming practices
c. rainfall was not plentiful enough for the crops to grow naturally
d. native americans had not yet domesticated livestock

Reread patrick henry’s quote about the continental congress. what change was taking place in how the colonists saw themselves?

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

How did the constitution of 1917 try to resolve some of the problems that started the mexican revolution