Four dogs

Make one HTML page showing four dog photos. How they're arranged depends on the window size. For large and extra large, all four are on one row.

For a small or medium window, there are two dogs per row.

For an extra small window, there is one dog per row.

You can use these photos:

Use at most three col_ classes for each column, like this:

This might be useful:

Submit your URL, as usual.