input question: What is the final step of the following process: - Solution caves are formed in limestone and similar rocks by the action of water - After a rain, water seeps into cracks and pores of soil and rock - The water percolates beneath the land surface - Some of the water reaches a zone where all the cracks and pores in the rock are already filled with water - Rainwater absorbs some carbon dioxide as it passes through the atmosphere and even more as it drains through soil and decaying vegetation - The water combines chemically with the carbon dioxide - A weak carbonic acid solution is formed???
output answer: This acid slowly dissolves calcite, forms solution cavities, and excavates passageways

What is the final step of the following process: - Networks of trees start forming - The trees die off - The dead material provides nutrients for more trees - The rising trees provide shelter - And more organisms begin to thrive
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Answer: The ecosystem known as a forest is made.

Q: What is the final step of the following process: - Acid rain is produced by chemicals that reach into the atmosphere - Falls onto the ground - The acid rain starts scouring rocks - Destroys vegetation
A: The lack of vegetation alters the surrounding environment.

Question: What is the final step of the following process: - Water from the ocean washes onto beaches in waves - The waves contain sediment from the ocean - The water and particles in it hit rocks and sand on the beach - The wind and current sometimes push the water and particles harder - Tiny parts of the rocks on the shore come off the larger rocks - The waves pick up sand and small rocks from the beach - The waves go back out into the ocean - The waves carry the new particles with them
Answer: Rocks and the beach look a little different.

[Q]: 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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[A]: The adult mushroom produce spores of its own to repeat the process.

Problem: Given the question: What is the final step of the following process: - Place the water in a pot - Cover the pot with a slightly too large cover - Place a larger pot under the first - Heat water to evaporation - Water vapor will collect on the lid - Drip into the second pot as fresh water
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The answer is:
Salt is left behind in the original pot.