What CSS property is used to create space between elements?

The use of the margin property in CSS is specifically designed for creating space between elements. Margin creates an external space around an element, effectively pushing it away from adjacent elements, which is crucial for layout alignment and visual separation in web design. It allows developers to control the outside spacing of elements, contributing to the overall aesthetics of a webpage.

On the other hand, padding deals with the internal space between an element's content and its border, while the border property adds a visible line around an element. The property "spacing" does not exist in CSS, which makes margin the only correct option for this purpose. Thus, margin is essential for manipulating the space between different HTML elements effectively.