How does the confirme_delete.html form work in Django?

Question

Django

I have a form that is called by the standard dzhang DeleteView.

<form method="POST">{% csrf_token %}
        <fieldset class="form-group">
            <legend class="border-bottom mb-4">Это действие приведёт к удалению товара с главной страницы!</legend>
            <h2>Удалить товар - {{ object }}?</h2>
        </fieldset>
        <button class="btn btn-danger" type="submit">Да</button>
        <a class="btn btn-secondary" href="{% url 'item_detail_url' object.pk %}">Отменить</a>
    </form>

How does Django know that an object needs to be deleted? After all, nothing is transmitted to the server, only the csrf token. Or does the attribute type="submit"have some other meaning besides submitting form data, which is not present in this example?