מה תפקידו של העיגול שליד התיבה?

בעלי מקצוע <i class="fa-solid fa-chevron-down" x-bind:class="{ 'transition duration-500 fa-rotate-180': isOpen, 'transition duration-500 fa-rotate-0': !isOpen }">

מדריכים <i class="fa-solid fa-chevron-down" x-bind:class="{ 'transition duration-500 fa-rotate-180': isOpen, 'transition duration-500 fa-rotate-0': !isOpen }">

מידע נוסף <i class="fa-solid fa-chevron-down" x-bind:class="{ 'transition duration-500 fa-rotate-180': isOpen, 'transition duration-500 fa-rotate-0': !isOpen }">

יצירת קשר <i class="fa-solid fa-chevron-down" x-bind:class="{ 'transition duration-500 fa-rotate-180': isOpen, 'transition duration-500 fa-rotate-0': !isOpen }">