What is the most likely reason literary critics compare the works of artists and authors who focus on the same subject matter?

The reason behind literary critics comparison of different artists works who focus on the same subject matter is:

Understanding their different perceptions and their tools to transmit that idea.

Explanation:

The literary critic is a very tough and strict discipline. Very often writers hate critics because they find opportunity areas in their work. However, this has to be seen with a constructive mindset, because they do it to understand the different perspectives of the same phenomenon as well as the ability of the writers to share or convince the reader of their posture about the topic.

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)