Demeter and Persephone – The reason for earth’s seasons

Pluto, ruler of the Dead, falls in love with Persephone, daughter of Demeter.

The god abducts the girl  to be his wife and queen of his realm in the Under World. In vain her mourning mother, goddess of harvest and fertility searched for her all over the earth.

From her sadness the earth does not drift any more. Animals, plants, the whole nature is in danger of extinction. What should be done? The story refers to the cycle of seasons on earth.