input question: What is the final step of the following process: - A stream or river must occur - Through erosion, the stream cuts into the soil and bedrock - Through continuous erosion, a deep gash is cut through - After many years the river may dry up???
output answer: A dry ravine is left

What is the final step of the following process: - Adult mushrooms produce spores - Release them into the air by process of sporulation - Spores are carried by the wind - Land in a hospitable growing environment - The spores germinate into the soil - The mushroom starts growing
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Answer: The adult mushroom produce spores of its own to repeat the process.

Q: What is the final step of the following process: - Stars burn mass - The star burns until it runs out of fuel - The star can no longer support its weight - The layers of hydrogen press down on the core - The core gets smaller and smaller under the pressure - The pressure causes gravity to get stronger - The gravity becomes so powerful that nothing can escape it - Anything that gets close to it, is drawn into it by its gravity - Light is drawn into it
A: Light can not escape

Question: What is the final step of the following process: - A bird lays eggs in a nest - The parent(s) incubate the eggs - The eggs hatch - The mother (and sometimes the father) bird take care of the baby birds - The baby birds grow up and get their flight feathers - The young birds learn to fly and leave the nest
Answer: The adult birds find mates and mate.

[Q]: What is the final step of the following process: - Items are collected - The items are sorted - Trash is removed from everything else - Goes to a landfill - The items go into a baler machine for each kind of material - They come out as bales
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[A]: The bales are shipped to manufacturers to use to make products.

Problem: Given the question: What is the final step of the following process: - A man and woman mate - Embryo is C - Embryo grows and develops into a fetus inside the woman's womb - The fetus is born - Begins to grow and develop through infancy and childhood - In the teenage years the human experiences puberty - Reaches sexual maturity - At 18 the human becomes an adult
++++++++++++++++++++++++++++++++
The answer is:
Adult may procreate continuing the cycle.