Answer:
The answer is: 1.- hydrological cycle, 2.- industry, 3.- sewage, 4.- agriculture, 5.- eutrophication, 6.- putrefaction, 7.- pesticides, 8.- petroleum, 9.- lead.
Explanation:
1. the continuous movement of water between the Earth's surface and the atmosphere - hydrological cycle.
2. pollutes water sources by dumping wastes in rivers, streams, and oceans - industry.
3. the leading cause of water contamination in countries without water treatment plants - sewage.
4. a source of water pollution caused by the overuse of pesticides and fertilizers - agriculture.
5. caused by an overabundance of organic matter in water supplies - eutrophication.
6. the decomposition of organic matter by microorganisms - putrefaction.
7. a chemical pollutant that can enter the water cycle through agricultural or domestic use - pesticides.
8. can cause the contamination of underground water supplies if poured on the ground - petroleum.
9. a metal that leaks into water supplies via the soil or aging water systems - lead.
The answer is: 1.- hydrological cycle, 2.- industry, 3.- sewage, 4.- agriculture, 5.- eutrophication, 6.- putrefaction, 7.- pesticides, 8.- petroleum, 9.- lead.