Example 1: Default Block Element Stacking

Item 1 (Default Block)
Item 2 (Default Block)

Item 3 (Paragraph, also a block element)

Explanation:

The `div` and `p` elements above are block-level elements. By default, block-level elements take up the full width available and stack one on top of the other. You do not need `flex flex-col` for this simple vertical arrangement.