Select the correct text in the passage. Erin is writing a paper on the northern lights. In which sentence should she add a definition to help clarify her ideas?
The northern lights are colorful swirls of light that flicker in the nighttime sky in the upper part of the northern hemisphere. This natural
occurrence happens when fast-moving, electrically charged particles (electrons) from space collide with the oxygen and nitrogen gas in our
atmosphere. These electrons originate in the magnetosphere. As they rain into the atmosphere, the electrons give energy to oxygen and
nitrogen molecules, making them excited. When the molecules return to their normal state, they release small bursts of energy in the form of
light.
When billions of these collisions occur and enough photons are released, the oxygen and nitrogen in the atmosphere let out enough light for the
eye to detect it. This ghostly glow can light up the night sky in a dance of colors. But since the northern lights are much dimmer than sunlight,
they cannot be seen from the ground in the daytime.
The color of the northern lights depends on which gas is being excited by the electrons and on how much energy is being exchanged. These
molecules also let out ultraviolet light which can only be detected by special cameras on satellites.

1. read the following excerpt from franklin d. roosevelt's "fireside chat 19":

on the other side of the picture, we must learn also to know that guerilla warfare against the germans in, let us say serbia or norway, us; that a successful russian offensive against the germans us; and that british successes on land or sea in any part of the world strengthen our hands.

remember always that germany and italy, regardless of any formal declaration of war, consider themselves at war with the united states at this moment just as much as they consider themselves at war with britain or russia. and germany puts all the other republics of the americas into the same category of enemies. the people of our sister republics of this hemisphere can be honored by that fact.  

the true goal we seek is far above and beyond the ugly field of battle. when we resort to force, as now we must, we are determined that this force shall be directed toward ultimate good as well as against immediate evil. we americans are not destroyers — we are builders.

analyze the effectiveness of this excerpt. how does it function within the speech as a whole? how does the structure of the excerpt to convey the speech's purpose and key points? support your argument with evidence from the speech. (10 points)

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explanation:

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