When you develop websites that scale well (visually) regardless of screen size, you are using which of the following principles?

When you develop websites that scale well (visually) regardless of screen size, you are using which of the following principles?

• Theme-based Scaling
• HyperText Scale Design
• Responsive Design
• Mobile Scaling 

EXPLANATION

Responsive design is an approach to web design aimed at crafting sites to provide an optimal viewing and interactive experience across a wide range of devices (from desktop computer monitors to mobile phones). Responsive design is becoming more important as mobile traffic now accounts for more internet traffic.

SOURCE

Spiceworks.com