Problem: Given the question: -  A plant grows near or on a rock - The plant roots begin to grow - Break apart the rock - The plant acids dissolve parts of the rock - The rocks are broken into more and more pieces  What might be the last step of the process?
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The answer is:
Erosion starts to occur.


Problem: Given the question: -  Forest fires burn forests - The animals living in the forest have fewer places to hide - Predators can now find their prey eaiser - Birds will fly away from the area  What might be the last step of the process?
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The answer is:
Waters warm up which hurts the fish swimming in them.


Problem: Given the question: -  You place aluminum cans and other products into recycling bins - Your town or a private company collect and transport the aluminum to a recycling facility - The aluminum is sorted and cleaned at the central recycling facility - The aluminum is melted down to remove coatings and inks - The melted aluminum is formed into large formations called ingots - The ingots are transported to another facility and rolled out to make them easier to manipulate  What might be the last step of the process?
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The answer is:

The ingots can now be turned into new aluminum products.