Read the passage.
metamorphosis is the process by which caterpillars become butterflies and tadpoles become frogs. it is a process studied by young children in school and by scientists who want to understand how pollution affects an eco-system. but change is not just a scientific phenomenon. it is a part of life. we experience it every day.
which best expresses the main idea?
1. frogs start life as tadpoles.
2.change is a part of daily life.
3. pollution affects both animals and humans.
4. metamorphosis means the process of changing.

Change is part of daily life

Explanation:

The main idea is the central point that the author is trying to communicate in a paragraph or text, although we usually find the main idea at the beginning of the paragraph, but we may also find the main idea in the middle of the paragraph after the author introduces the main idea, and then gives supportive information, or at the end of the paragraph with supportive information presented before the main idea.

In this case, the author introduced us to what metamorphosis is about, and how students and scientists study it, but how change is in the every day life, not only on scientific studies.

To define the main idea we need to ask what the topic of the paragraph is, and what the author is trying to express through the information presented, as well as the purpose of the paragraph.

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)