Which property adds space outside of an element?

left

margin

padding

space

margin

The property that adds space outside of an element is the "margin" property.

The property that adds space outside of an element is the "margin" property. This property controls the space between an element and its neighboring elements.

To add space outside of an element using margin, you can follow these steps:

1. Identify the element to which you want to add space.
2. Specify the margin property in CSS for that element.
3. Specify the value for the margin property to control the amount of space you want to add. For example, you can use values like pixels (px), percentages (%), or em units.

Here's an example of how you can add space outside of an element using the margin property in CSS:

```css
.my-element {
margin: 20px; /* Adds 20 pixels of space around the element */
}
```

In this example, the margin property is applied to an element with the class name "my-element". The value 20px indicates that 20 pixels of space will be added around the element on all sides.

Remember that margins are external to the element, so they affect the space between the element and its neighboring elements.