What is the topic of a paragraph?

The simplest description of what the paragraph is about.

The most general or important idea that the writer wants the reader to understand.

Where can you find the main idea in a paragraph?

In the first, middle, or last part of the paragraph

Studying is the best way to learn.

Friends have strengths you do not have; kindness is important in building friendships; friendships teach us to be patient.

I can find the main idea of a story and tell some details that support it.

1
The topic of a paragraph is the simplest description of what the paragraph is about.
2
The main idea expresses the most general idea that the writer wants the reader to take away and is always stated in complete sentences.
3
The main idea can be found in the first, middle, or last part of a paragraph.