Problem: Given the question: -  Rain picks up carbon dioxide as it falls to earth - The rain falls on the soil over the limestone - The carbon dioxide in the rain washes through the soil - The carbon dioxide turns into acid - The acid in the rain gets to the limestone below the soil - The acid dissolves the limestone - Acid continues to erode the limestone with more rain over time - The eroded limestone sometimes forms caves.  What might be the first step of the process?
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The answer is:
Limestone is located under the soil


Problem: Given the question: -  The virus attaches to the cell's surface - The cell swallows the virus - The virus' RNA is released into the cell - The cell mistakenly reads the virus' RNA instead of its own - The cell creates new viruses - The animal cell releases the new viruses - The new viruses can infect more cells.  What might be the first step of the process?
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The answer is:
The virus finds an animal cell


Problem: Given the question: -  They are born and are a baby - The baby grows into a child - Puberty turns the child into an adolescent - The adolescent becomes an adult - An adult becomes an elderly person - The elderly person dies.  What might be the first step of the process?
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The answer is:
