Q: 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.
Steps: (1) An animal eats a lot of food to fatten up (2) The animal finds or builds a suitable place to hibernate where they can stay warm and protected (3) Their heart rate and breathing slow down to conserve energy (4) They emerge from the den when the weather is warming up again.  
Where does the following step fit into the given list of steps: The animal moves into their den 
A:
 After step 2. 