How many stages do geographers say early cultures go through?

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

This word for a bug or malfunction was popularized in the 1962 book into orbit by the mercury astronauts

What type of damages can you cause while driving