PART A: Which TWO of the following best identify the central ideas of this article? Many people and groups contributed to the development and refinement of mass-producible Liberty ships, highly formidable B-29s, and the atomic bomb. B. Throughout World War II, more Americans were killed or wounded while working in industrial settings in the United States than in combat. С. Despite being in a relatively lacking condition before the United States entered World War II, American industry developed and progressed considerably thereafter. D. The widespread adoption of the assembly line system allowed industrial productivity to skyrocket within the United States. E. The creation and use of the atomic bomb was the most significant event of the Second World War. F. The United States' improvements upon Liberty ships were the nation's most important contribution to the war effort in Britain. ​

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)

answer; deontological theory;