The Host, The Parasites

Hiya! This is my story for the wattpad 30days writing challenge!! I've never written a story like this before, so please go easy on me~
This story is about our earth, but in the 26th century. Human had used up most recourses, wars between nations caused billions of death. Those who survived still tried too discover more and more resources, and they started sending human to outer space and explore new planets. In the third year of their journey, they reached the edge of the Solar System, but a terrible accident happened and their space shuttle exploded. The crew were believed all dead, but the main character of this story, Josh, was rescued by another space shuttle passing by. He was brought to the area where the rescuers lived. A prophet and a decision was told to him, the Earth will die, and will rise again. The fight deciding whether human lives or dies had begun, and Josh was willing to save both the human being and the Earth. Can he really succeed? Read, and you'll find out~~~