|The controlling idea contains your opinion about the topic.
It shows what direction you are going to take in writing about the topic.
It helps the reader understand your purpose for writing the paragraph or
The writer has a positive feeling about Victoria and shows this by the use of positive adjectives: wonderful, beautiful, interesting. From this topic sentence we know that the paragraph will be about the positive aspects of the topic Victoria.
In order to find your main idea about a topic, review your pre-writing activities and look for the most repeated words and phrases or key ideas. Look for your strongest feeling. What makes the topic important to you?
Here is an example: