The inventor in the photo above is thomas edison. what is the invention behind him?
a.
the puddling furnace
b.
the first steam engine
c.
the flying shuttle
d.
the original dynamo (power plant)

answer is d

Volcanic irruption is most likely to be violent when a) volcanoes near to the sea b) the neck of the volcano is sealed by a plug c) the lava is viscous d) the lava reaches the surface through a fissure e) the volcano is on the ocean floor

Most countries in the middle east must import a majority of their a. gasoline b. oil c. food d. water

Where the main factor that enabled the growth of cities and civilizations was the existence of