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.

[EX Q]: 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 
[EX A]:  After step 3. 

[EX Q]: Steps: (1) The butterfly starts as an egg (2) The egg hatches to form a larva, also called a caterpillar (3) The caterpillar then forms itself into a pupa, or chrysalis (4) The caterpillar in the chrysalis begins change, a process called mmetaphorphosis (5) The caterpillar completes its metamorphosis and has turned into a butterfly (6) The adult butterfly emerges out of the chrysalis and flys away!  
Where does the following step fit into the given list of steps: The carterpillar molts (loses its skin) many times as it grows 
[EX A]:  After step 2. 

[EX Q]: Steps: (1) Acid rain leaches aluminum from clay particles in soil (2) Acid rain dissolves minerals and nutrients in soil (3) Washes them away so plants can&#x27;t benefit from them (4) PH in soil and water gets affected which can kill plants and animals (5) Acid rain in fog at higher elevations can strip foliage off trees.  
Where does the following step fit into the given list of steps: Aluminum flows into streams and lakes 
[EX A]:
 After step 1.