Which property controls the text size in CSS?

The property that controls the text size in CSS is font-size. This property allows you to specify the size of the font used for text content on a web page, affecting how text is visually presented to users. By using font-size, you can set specific sizes in various units, such as pixels, ems, rems, percentages, or points, providing flexibility in designing responsive web layouts.

Other options, while they may seem related to text styling, do not specifically control text size. Font-style influences the style of the font, such as italic or normal, but not its size. Text-size is not a valid CSS property and does not exist in CSS, while text-style is also not a recognized property. By understanding the purpose and correct usage of the font-size property, developers can ensure that text is appropriately sized for readability and design aesthetics.