Many tourists visit california’s death valley national park motivated by curiosity to see a geological phenomenon known as the sailing stones or moving rocks. the sailing stones only move every few years, and they leave a trail behind them. geologists have been researching the stones since 1915, but their records indicate that there are no consistent patterns in the stones’ movements. the writer wishes to add a sentence that elaborates on the geologists’ observations of the stones’ movements. given that all the following statements are true, which one, if added after the last sentence, would most effectively accomplish the writer’s goal? some stones weigh as much as one hundred pounds and are unevenly shaped. some explanations for this phenomenon include the influence of supernatural elements and the force of strong winds. stone trails vary in length and direction, and some stones leave a straight path while others weave through the desert. according to an article published in the los angeles times in may 2013, some stones have been stolen from death valley national park.

the guest is my guess

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)