Which activity represents the single largest home use of water in the United States

Flushing the toilet

Explanation:

The average household in the U.S. flushes the toilet at least 15-20 times per-day.

I think it's Agriculture

Agriculture is a major user of ground and surface water in the United States, accounting for approximately 80 percent of the Nation's consumptive water use and over 90 percent in many Western States.

irrigation

Thermoelectric power and irrigation remained the two largest uses of water in 2015, and total withdrawals decreased for thermoelectric power but increased for irrigation. Withdrawals for thermoelectric power were 133 Bgal/d in 2015 and represented the lowest levels since before 1970.

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Explanation:

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.