[Q]: - Chemicals like sulfur dioxide and nitrogen are released into the air - These substances rise into the high atmosphere - They react with water and oxygen - This creates a more acidic rain What might be the last step of the process?
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[A]: The rain with the high acid content falls.

[Q]: - Food leaves the esophagus and enters the stomach - The stomach churns the food - With the aid of stomach acids - The food becomes a thick liquid What might be the last step of the process?
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[A]: Is then passed to the small intestine.

[Q]: - Acid rain leaches aluminum from clay particles in soil - Aluminum flows into streams and lakes - Acid rain dissolves minerals and nutrients in soil - Washes them away so plants can't benefit from them - PH in soil and water gets affected which can kill plants and animals What might be the last step of the process?
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[A]: Acid rain in fog at higher elevations can strip foliage off trees.

[Q]: - The liver filters blood from the digestive tract - The liver produces bile - The liver produces proteins for blood plasma - The liver converts excess glucose into glycogen for storage - The liver converts ammonia to urea What might be the last step of the process?
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[A]:
The liver regulates blood clotting.