Read the excerpt from "Thomas Edison: The Master of Improvement.” Its glow was produced by electricity passing through a filament, or tiny piece of material. The inside of the glass bulb was a vacuum.

Based on context clues, what is the meaning of the word filament?

a place where electricity is made
a very small piece of material
the inside of a lightbulb
the vacuum inside a bulb

Elie wiesel’s “the perils of indifference” speech how do paragraphs 15-16 contribute to the development of the text’s central idea?

It is true that prior to 1914 the united states often had been disturbed by events in other continents. we had even engaged in two wars with european nations and in a number of undeclared wars in the west indies, in the mediterranean and in the pacific for the maintenance of american rights and for the principles of peaceful commerce. but in no case had a serious threat been raised against our national safety or our continued independence. what is the theme of this excerpt? a. the responsibility for americans to avoid involvement in war.b. america’s history of international involvement.c. a new kind of threat to american security.d. america’s history as a peaceful nation.

Is the slightly humorous tone of kristof's essay inappropriate for a discussion of deliberately killing wild animals? why or why not?