Problem: What is the final step of the following process: - Chemicals like sulfur dioxide and nitrogen are released into the air - These substances rise into the high atmosphere - They react with water and oxygen - This creates a more acidic rain

A: The rain with the high acid content falls.

Problem: Given the question: What is the final step of the following process: - An isotope has too many protons - The isotope is unstable - The isotope emits radiation - The isotope decays - The isotope loses some atomic particles - The isotope turns into a different element
++++++++++++++++++++++++++++++++
The answer is:
The isotope is finished decaying and emitting radiation.

input question: What is the final step of the following process: - Build a satellite - Attach a rocket - Add rocket fuel - Launch rocket???
output answer: Satellite goes into orbit.

What is the final step of the following process: - Food is put into mouth - Food is chewed and mixed with saliva (spit) - Food travels down the esophagus (throat) - Food travels into the stomach - Acid in the stomach breaks the food down further - Food travels into the small intestine - Nutrients from food are absorbed into the blood stream - Food travels into the large intestine - Most of the remaining material is now waste
----
Answer: The waste is eventually removed from the body.

Q: What is the final step of the following process: - Water gets into cracks in rocks - The water freezes into ice - The cracks expand - Over time the rocks split
A: The rocks are now in smaller pieces.

[Q]: What is the final step of the following process: - There is a rain cloud in the sky - Small bits of ice within the cloud bump each other - The collisions create electrical charge - Lighter, positively charged particles sink to the bottom of the cloud - Heavier, negatively charges particles rise to the top
****
[A]:
When the positive and negative charges grow large enough, a giant spark, called lightning occurs