Which CSS property creates rectangles with rounded corners around text?

• A. Border-radius
• B. Border
• C. Box-shadow
• D. Outline

Answer: (A)

Border-radius controls the curvature of an element's corners. By assigning a radius value, you round the corners of the box that contains the text, so the text sits inside a rectangle with softened edges. For example, applying a value like 12px creates subtle rounding, while 50% can yield a pill or circle shape if the element’s height matches its width. Other properties don’t change the box shape: border draws a straight edge around the element, box-shadow only adds shading, and outline outlines the element without altering its corners. So the rounded corners come specifically from border-radius.