Identify the main issue of the following argument:
the recent uprising in egypt to overthrow the 30-year reign of mubarak was not the result of the bush administration's call for democracy in the region. after all, other such american presidents have made similar appeals for years, and no change happened in the middle east. furthermore, the bush administration was not highly regarded by the people of egypt. lastly, the real concerns of the people of egypt are economic reform and political corruption.

The main issue in the argument is: "Egypt President bad economical handling politics and corruption led him to resign, instead of the influence or comments of United States President Mr. George W. Bush."

the earth’s crust is broken into separate pieces called tectonic plates (fig. 7.14). recall that the crust is the solid, rocky, outer shell of the planet. it is composed of two distinctly different types of material: the less-dense continental crust and the more-dense oceanic crust. both types of crust rest atop solid, upper mantle material. the upper mantle, in turn, floats on a denser layer of lower mantle that is much like thick molten tar.

each tectonic plate is free-floating and can move independently. earthquakes and volcanoes are the direct result of the movement of tectonic plates at fault lines. the term fault is used to describe the boundary between tectonic plates. most of the earthquakes and volcanoes around the pacific ocean basin—a pattern known as the “ring of fire”—are due to the movement of tectonic plates in this region. other observable results of short-term plate movement include the gradual widening of the great rift lakes in eastern africa and the rising of the himalayan mountain range. the motion of plates can be described in four general patterns:

collision: when two continental plates are shoved together

subduction: when one plate plunges beneath another (fig. 7.15)

spreading: when two plates are pushed apart (fig. 7.15)

transform faulting: when two plates slide past each other (fig. 7.15)