An interactive quiz about humpback whales presents a series of four multiple-choice questions. After each answer, the interface indicates correctness with color-coded buttons, then displays a final score and percentage upon completion. The quiz structure uses Svelte components, managing state with `$state` and `$derived` for the current question, score, and answer selections. The application is built with Svelte, styled with custom CSS, and fetches its question data from a JavaScript module (`quizData.js`).