Final answer:
The correct answer is Relative sizing, which is used in web development for flexible and responsive design that adapts to different screen sizes.
Step-by-step explanation:
The sizing property that requires you to input the specified percentage of the screen is Relative sizing. This is commonly used in web design and development to create layouts that adapt to the size of the screen or window.
By using relative units like percentages, ems, or viewport units (vw, vh), elements can resize proportionally, leading to a more responsive and flexible design that works across various device sizes.
The Responsive sizing property requires you to input the specified percentage of the screen. It allows web developers to create designs that adapt to different screen sizes and resolutions. This is achieved through the use of relative units like percentages, which scale with the screen size.