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.

At once a voice arose among

The bleak twigs overhead

In a full-hearted evensong

Had chosen thus to fling his soul

Upon the growing gloom.

Explanation: