One of the most important reasons for only using reliable water source is to reduce?

The right answer is The number of parasites, such as Cyclospora Cayetanensis.

The health risks associated with water are due to the use of polluted water, unfit for the intended use, for example:

- Consumption of water (beverage, ...), live products or products grown in aquatic environments (shellfish, ...);

- Swimming ;

- Use in a hospital environment (hot water, ultra pure water, ...).

Depending on the pollutants, the health risk is of an infectious nature (viruses, bacteria, parasites, fungi), chemical (mineral, organic), or physical (thermal, radioactive).

The risks involved are more or less long term. Some are known and proven for health, and others are suspected or even emerging.

from my research i have to the conclusion that decomposers, such as fungi, bacteria and invertebrates, play a critical role in nutrient cycling and without them the earth's ecosystem may not support life as we know it. elements such as carbon, nitrogen and phosphorus exist in limited amounts on earth, although huge amounts of carbon are being released into the atmosphere from underground sources now by humans. it is still extremely important that other nutrients be retained by the process of re-use. decomposers are organisms that are able to chemically break down dead material and make these elements available for use by other organisms. without this breakdown of dead material, dead bodies would pile up. so decomposers also play a role in clean up also. without them, life might not continue as we know it and dead material would overwhelm the earth.