Life is a web, with every strand connected to every other strand. For example, herds of caribou live in cold, Arctic locations. Caribou hate mosquitoes. In the past few years, warmer temperatures in summer have allowed mosquito populations to explode. So the caribou spend a lot more energy swatting away the mosquitoes. All this swatting leaves the caribou less energy to find food and prepare for the next long winter. Female caribou are especially troubled because it takes so much energy to give birth and raise their young.

http://www. nasa. gov/climatekids

Which would function MOST EFFECTIVELY as a concluding sentence?
A) This shows that even if one species of plant or animal changes, events involving other species are not affected.
B) As you can see, when you closely study a variety of animals and plant species, you will always be amazed and confused.
C) This illustrates that when one species of plant or animal changes, a whole chain of events can follow involving other species.
D) This is another example of the amazing existence of our wonderful world of plants and animals.

C) This illustrates that when one species of plant or animal changes, a whole chain of events can follow involving other species.

Explanation:

thank me later

C

Explanation:

This illustrates that when one species of plant or animal changes, a whole chain of events can follow involving other species. Only this answer choice concludes the key message.

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)