Visual Testing (VT) Practice Exam 2025 – Comprehensive All-in-One Guide for Exam Success!

The primary focus of visual styles manipulated by CSS (Cascading Style Sheets) is indeed the appearance of elements on a webpage. CSS is a stylesheet language designed specifically for describing the presentation of a document written in HTML or XML. It controls various visual aspects, such as colors, fonts, layouts, spacing, and overall aesthetics of web pages. This manipulation allows web developers to create visually appealing interfaces that enhance user experience.

In contrast, other options like functionality refer to the operational aspects and features that enable interaction with web applications, which is not the domain of CSS. Security measures pertain to protecting applications and data, while data handling involves the processing and management of data within an application. All these aspects are outside the scope of what CSS is designed to control, which directly emphasizes why the focus of visual styles is on the appearance of webpage elements.