(a) It is a highly polluted area on earth
(b) It is an extremely cold region on earth
(c) One of the hottest places in the world
(d) The existence of a large number of volcanoes
(a) It is a highly polluted area on earth
(b) It is an extremely cold region on earth
(c) One of the hottest places in the world
(d) The existence of a large number of volcanoes