To make a background image responsive, use CSS properties like 'background-size: cover;' to ensure the image covers the area proportionally. Additionally, set the 'background-attachment: fixed;' for a parallax effect, and use media queries to adjust the image settings based on screen size for an optimal viewing experience.
![How to Create a Responsive Background Image With CSS [Guide]](https://www.webfx.com/wp-content/uploads/2021/10/0431-02_responsive_background_demo_ss.jpg)
![How to Create a Responsive Background Image With CSS [Guide]](https://www.webfx.com/wp-content/uploads/2021/10/0431-03_responsive_bg_example_01sailingcollective.jpg)
