Someone please answer this how does Roosevelt use repetition as rhetoric here to advance his purpose?

to demonstrate that people need to manage their use of Natural Resources

to show that Industries require unlimited natural resources

to explain that the growth of civilization is important to advance the human race

to establish that knowledge and Industry are interdependent​

President Theodore Roosevelt (1858-1919) was an ardent advocate of outdoor life, and of all his policies that of conservation of the nation’s natural resources was of the most permanent significance. In his first message to Congress, he had declared that the forest and water problems were the most vital domestic problems facing the American people. During his administration he succeeded in setting aside almost 60 million hectares of timber land in the United States proper and some 34 million hectares of mineral lands in Alaska. More than this, he dramatized the conservation problem before the Nation by his speeches, his actions, and by the convening of the Conservation Conference, making the protection of natural resources a national issue. Following is an excerpt from his Seventh Annual Message to Congress on December 3, 1907.

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)