This report provides an in-depth analysis of the National Geographic website, focusing on its responsiveness and adherence to responsive web design (RWD) principles. The report examines the website's features, user reviews, and strengths and weaknesses. It then analyzes the website's responsiveness across various screen sizes and compares its performance against the nine key RWD principles. The report concludes with recommendations for improvement, aiming to enhance the website's user experience and accessibility.