Final answer:
The main sources of water use in the USA are agricultural, industrial, residential, and recreational. Trends in water usage show an increase in industrial and residential water use over time.
Step-by-step explanation:
The main sources of water use in the USA are A) Agricultural, Industrial, Residential, and Recreational. Agricultural water use refers to water used for crop irrigation and livestock production. Industrial water use refers to water used in manufacturing processes and for cooling in power plants. Residential water use refers to water used in households for drinking, cooking, bathing, and watering lawns. Recreational water use refers to water used for swimming pools and other leisure activities.
Trends in water usage in the USA show an increase in industrial and residential water use over time. This is driven by population growth, urbanization, and increased economic activity. There has also been a shift towards more efficient water use practices and conservation efforts to mitigate the impact of water scarcity.