Fill in the blanks with suitable words:

The earth is a vast planet. It is (a)_________ in shape. One third of its total area is land while the other three portions are covered with (b)_______ . The water areas are divided into oceans, seas and (c)___________ . The surface of the land area is (d)________ of variety. There are high hills, green forests (e)________ stretches of deserts. The land mass is divided (f)________ some continents. Under each continent, there are a (g)_______ of countries. The interior of the earth is (h)_________ in mineral resources. There is existence of life only on (i)_________ earth. But, this existence of life would be impossible (j)__________ sunlight. In fact, sunlight is the prerequisite for the existence of all types of living beings.