What causes the top navigation bar to wrap to the next line in two different locations in W3.CSS?

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There are a few different reasons why the top navigation bar in W3.CSS might wrap to the next line in two different locations:

1. Too many items in the navigation menu: If there are too many items in the navigation menu, or if the items are too long, they may push the other items onto the next line. This can happen in the middle of the navigation menu, or at the end.

2. Screen width: The navigation menu in W3.CSS is designed to be responsive, meaning it will adjust to fit different screen sizes. When the screen width is too narrow, the navigation menu may need to wrap to the next line in order to fit.

3. Custom styles: If you have added custom styles to the navigation menu, this could also cause it to wrap to the next line in unexpected places. Incorrect padding, margins, or width settings could all contribute to this issue.