col-a

this is a pragrapth

col-b

this is a pragrapth

col-c

this is a pragrapth

col-d

this is a pragrapth
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<!DOCTYPR html> <html lang="en"> <head> <meta charset="UTF-8"> <title>BootStrap</title> <meta name="viewport" content="width=device-width, initial-scale=1"> <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-9ndCyUaIbzAi2FUVXJi0CjmCapSmO7SnpJef0486qhLnuZ2cdeRhO02iuK6FUUVM" crossorigin="anonymous"> <style> .container{ border:1px solid black; } .row{ border:1px solid red;} .col, .col-1, .col-2, .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-9, .col-10, .col-11, .col-12 { border:1px solid blue;} .pink{ background:pink; } .green{ background:green; } .silver{ background:silver; } .lblue{ background:lightblue; } .Orange{ background:orange; } .Violet{ background:Violet; } .msgreen{ background:MediumSeaGreen; } </style></head> <body> <!-- display on mobile screen--> <div class="container"> <div class="row"> <div class="col-md-3 pink"> <h2>col-a</h2> this is a pragrapth </div> <div class="col-md-3 d-block d-sm-none green"> <h2>col-b</h2> this is a pragrapth </div> <div class="col-md-3 lblue"> <h2>col-c</h2> this is a pragrapth </div> <div class="col-md-3 orange"> <h2>col-d</h2> this is a pragrapth </div> </div> </div> </body> </html>