instruction:
Given a list of steps and an additional step, determine where the step fits into the original list of steps. A correct answer, correctly places the given step into the set of steps so that it creates a new plausible set of steps. Output must be formatted as 'After step n', where n is the step number after which the given additional step is to be inserted.
question:
Steps: (1) Sunlight passes through the glass into the greenhouse (2) The absorbed sunlight is converted to heat (3) The heat cannot escape the glass (4) The heat is trapped in the greenhouse (5) The hot air rises (6) The colder air at the top is pushed to the bottom (7) The colder air is then warmed by the floor and the plants.  
Where does the following step fit into the given list of steps: The plants and floor absorb the the sunlight 
answer:
 After step 1. 


question:
Steps: (1) The liver takes in blood from the rest of the body (2) The liver uses enzymes to clean the blood (3) The liver creates bile from the items filtered (4) The liver takes energy and stores it as glycogen (5) The bile is sent to the intestines.  
Where does the following step fit into the given list of steps: The cleaned blood is expelled 
answer:
 After step 2. 


question:
Steps: (1) Dead organic material accumulates on the bottom of oceans, riverbeds or swamps, mixing with mud and sand (2) Over time, more sediment piles on top (3) The resulting heat and pressure transforms the organic layer into a dark and waxy substance known as kerogen (4) The molecules break up into shorter and lighter molecules composed almost solely of carbon and hydrogen atoms (5) It will turn into either petroleum or natural gas  
Where does the following step fit into the given list of steps: Left alone, the kerogen molecules eventually crack 
answer:

 After step 3.