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.
One example: Steps: (1) Solar radiation reaches Earth's atmosphere (2) Some is reflected back into space (3) The rest of the energy is absorbed by land and oceans, heating the Earth (4) Some of this heat is trapped by greenhouse gases in the atmosphere (5) Human activities such as burning fuel are increasing the amount of greenhouses gases (6) This causes more heat radiation to stay trapped in our atmosphere (7) The Earth's temperature rises  
Where does the following step fit into the given list of steps: Heat radiates from Earth to space 
Solution is here:  After step 3. 
Explanation: The correct answer is 'After step 3'. The given step is 'Heat radiates from Earth to Space'. Step 3 introduces a new concept of generated heat. Step 4 mentions that the heat is trapped into the atmosphere. In order for the heat to get to the atmosphere, the heat must radiate from Earth to space. Therefore, the correct answer is 'After step 3.'

Now, solve this: Steps: (1) Carbon dioxide enters the leaves through the stomates by diffusion (2) Energy harvested through light reaction is stored by forming ATP (3) Carbon dioxide and energy from ATP are used to create sugar (4) Oxygen exits the leaves through the stomata by diffusion (5) The plant reuses the water or the water exits through the stomata as water vapor.  
Where does the following step fit into the given list of steps: Water is transported to the leaves in the xylem 
Solution:
 After step 1. 