Explanation of Bootstrap Classes:

1. col-12: This makes the column take up the full width (12 columns) on extra small devices (phones).
2. col-sm-6: On small devices (≥576px), the column takes up 6 out of 12 columns (50% width).
3. col-md-4: On medium devices (≥768px), the column takes up 4 out of 12 columns (33.33% width).
4. col-lg-3: On large devices (≥992px), the column takes up 3 out of 12 columns (25% width).

Responsive Behavior:

• On smaller screens, each column will stack vertically (full-width).
• On medium screens (≥768px), each column will take up 4 columns of the 12 available, placing 3 items per row.
• On larger screens (≥992px), the columns will take up 3 columns each, placing 4 items per row.

Additional Notes:

• You can use other breakpoints as needed (col-xs, col-sm, col-md, col-lg, col-xl).
• You can adjust the number of columns at different screen sizes by changing the classes.

For example:

• col-sm-4: This will take up 4 columns on small screens (small tablets and above).
• col-lg-6: This will take up 6 columns (50%) on large screens.