Task: Sentence Ordering
Input (English): Steps: (1) Adult mushrooms produce spores (2) Release them into the air by process of sporulation (3) Spores are carried by the wind (4) Land in a hospitable growing environment (5) The mushroom starts growing (6) The adult mushroom produce spores of its own to repeat the process.  
Where does the following step fit into the given list of steps: The spores germinate into the soil 
Output (English):  After step 4.