Which CSS3 property is used to center text?

The property that is used to center text in CSS3 is "text-align." This property can be applied to block-level elements, such as paragraphs or divs, and it allows you to specify the horizontal alignment of inline content within the element. When you set the "text-align" property to "center," the text within that element will be centered horizontally.

For instance, if you have a paragraph element and you want to center its text, you would use:

p {

text-align: center;

}

None of the other options function as valid CSS properties for centering text. "center" and "align" are not recognized CSS properties, and "text-center" is not a standard CSS property either; it is sometimes used in CSS frameworks like Bootstrap as a class name but not as a CSS property. Hence, "text-align" is the correct and valid approach for achieving centered text in web development.