input question: What is the final step of the following process: -  Air is drawn in through the mouth - The air goes down the esophagus - The air moves into the lungs - The carbon dioxide is removed - The remaining oxygen enters the body???
output answer: The remaining carbon dioxide is expelled through the mouth.

input question: What is the final step of the following process: -  A dam is built in an area prone to flooding - A large amount of rain occurs - The water builds up behind the dam - The dam opens its floodgates when it starts to get full - The water flows into a river below the dam - The dam closes its gates - The dam will occasionally open its gates again to gradually release more water???
output answer: Eventually all of the floodwater will be slowly released into the river without causing any flood damage.

input question: What is the final step of the following process: -  A butterfly lays an egg - A larvae matures inside of the egg - The caterpillar hatches from the egg - The caterpillar eats and grows - The caterpillar spins a coccoon around itself and forms into a pupa - The butterfly forms inside of the coccoon - The mature butterfly emerges from the coccoon - The butterfly mates???
output answer: The female butterfly lays eggs.

input question: What is the final step of the following process: -  One type of air pollution is the addition of carbon dioxide gas into the air - Some scientists believe that releasing too much carbon dioxide into the atmosphere is one of the causes of global warming - This upsets the balance of the carbon cycle - The ozone layer helps protect us from harmful rays from the sun - It is getting damaged from air pollution such as methane gas from livestock and CFCs from spray cans - Acid rain is created when gasses such as sulfur dioxide get high into the atmosphere - The wind can blow these gasses for miles and then they get washed out of the air when it rains???
output answer:
This rain is called acid rain and can damage forests and kill fish.