Need help with Css Bootstrap

Question

Using the Bootstrap grid system, create a grid of five rows and four columns per row
1. All elements must be <div> elements
2. Each row element contains only one standard Bootstrap class
3. Each element denoting a column contains 2 standard Bootstrap classes: the first - to indicate the size of the column (necessarily with an individual .col-{number} class); and the second – to indicate the background color (.bg-primary – blue, .bg-warning – yellow)
4. Each element representing a column contains the text col 1, col 2, etc.
https://sololearn.com/compiler-playground/W1n6Ae4DAe1N/?ref=app

Answer 1

You might consider adjusting the color classes to better distinguish the columns or modifying the distribution of the columns for different screen sizes using classes such as col-md-{number} or col-lg-{number}.

you are missing '</div>' in line 33