Most of the pulling force that drives plate motion is produced

Explain why the rate of urbanisation is in the way it is between developed and undeveloped countries.

After railroads, the next revolution of transportation came with the development of (a) automobile (b) telegraph (c) steam engine

Afarmer who is grown corn for the past five years notices in the sixth year that the his harvest is significantly smaller, despite an increase in labor on the farm. the following year, the harvest continue to decline. which of the following explanations most plausibly accounts for the reduction in corn yield? a) soil degradation b) desalinization c) better irrigationd) terracing