What does User Interface (UI) focus on?

The focus of User Interface (UI) design is primarily on the interaction layout and design elements. UI encompasses the visual components and overall presentation of a software application, making it crucial for creating an intuitive and efficient user experience. This includes the arrangement of buttons, icons, images, text, and other interactive elements on the screen that users directly engage with. A well-designed UI allows users to navigate through an application smoothly, enhancing usability and satisfaction.

Effective UI design considers factors such as color schemes, typography, spacing, and the overall aesthetic in conjunction with usability principles. By concentrating on these layout and design elements, UI aims to facilitate an engaging and productive interaction between the user and the software, ensuring that tasks can be completed as intuitively as possible. This is why the answer emphasizing interaction layout and design elements is the correct choice in this context.