To complete the sentence with a comparison, you can use the following structure:

**"The more young the children are, the easier it is for them to remember the lesson."**

This structure establishes a comparison, showing that as the children are younger, it becomes easier for them to remember the lesson.

You can transform the given sentences into a comparative form using "the more" like this:

"The more the children are young, the easier it is for them to remember the lesson."

This construction emphasizes the relationship between the children's age and their ability to remember the lesson.

You can transform the given sentences into a comparative form using "the more" like this:

"The more the children are young, the easier it is for them to remember the lesson."

This construction emphasizes the relationship between the children's age and their ability to remember the lesson.