Which of the following is a characteristic of the Sahara Desert mentioned in the passage?

The Sahara Desert, the largest hot desert in the world, is characterized by its extreme aridity and vast landscapes of sand dunes, rocky plateaus, and salt flats. Despite its harsh conditions, it supports a variety of specialized flora and fauna, including resilient desert plants and animals adapted to scarce water and intense heat. Its size and extreme environment shape regional weather patterns and human populations.