(25 points) what is the purpose of this paragraph from a speech about solar energy?

the idea of harnessing the power of the sun is not a new one. as far back as the 1700s, a swiss physicist named horace-bénédict de saussure created the first solar oven. more recently, solar panel use steadily grew in the 1970s and 1980s in cars and homes around the world. however, the use of solar panels appears to have lessened over the past few decades. this trend is unfortunate because this energy source has extraordinary benefits. solar energy is renewable, sustainable, reliable, and cost-efficient. shouldn't we all consider investing in this valuable natural resource?

a.
to inform the audience about the history and origin of solar power
b.
to persuade the audience to start using solar power more frequently
c.
to convince the audience that solar power is the most profitable form of energy
d.
to instruct the audience about how to use solar power efficiently

its B to persuade the audience to start using solar power more frequently

Explanation:

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)