> D) Fossilized</label>
                </div>
            </div>

            <div class="question">
                <p>3. Which layer of the Earth's interior is composed of molten iron and nickel?</p>
                <div class="options">
                    <label class="option"><input type="radio" name="q3" value="a"> A) Crust</label><br>
                    <label class="option"><input type="radio" name="q3" value="b"> B) Mantle</label><br>
                    <label class="option"><input type="radio" 