Which of the following properties is used to align text in an element?

The property used to align text in an element is the "text-align" property. This CSS property specifies the horizontal alignment of text within its parent container. By using values like "left," "right," "center," or "justify," a web designer can control how the text appears in relation to the rest of the content and the edges of the container. For example, setting "text-align: center;" will center the text within its element, while "text-align: right;" will align it to the right side, enhancing the layout and visual organization of a webpage.

The other properties mentioned do not serve the purpose of text alignment. "Background-color" refers to the color behind the content of an element and does not affect the text's position. "Font-weight" is used to control the boldness of the text, while "font-style" is primarily used to specify the style of the font, such as italic or normal. Therefore, "text-align" is the only appropriate choice for aligning text in a web element.