What are the limiting factors for a squirrel

When talking about nature there are some factors or practices generated by nature itself that can change the population of animals, including squirrels, in an ecosystem. For example the availability of food, water, shelter, competition for resources and disease. These are called limit factors. 

Explanation:

There are some factors that can cause an increasement in a population. For example, the presence of more plants than usual can cause an increment of insects that eat those plants. But, this is not always good. Balance in nature is always the best. Predator and prey relationship is a fundamental topic in the balance of nature. If the loss of a natural predator arrives at an ecosystem overpopulation arrives too.  

Squirrels are in charge of the renewal of the forests. So for their survival a nice balance in mushrooms and seeds it's very important. To sum up. Squirrels as many other animals in nature are constantly trying to survive among predators, diseases, lack of shelter, water, and food. these are the limit factors that a squirrel can find at its ecosystem.  

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)

the krebs cycle and electron transport occur in the mitochondria, though other than that i would need to know more information.