Final answer:
The leading cause of death worldwide caused by unsafe drinking water is diarrhea, which the body utilizes to get rid of harmful substances. This is commonly caused by infective microorganisms present in unsanitary water, leading to severe dehydration.
Step-by-step explanation:
The leading cause of death worldwide caused by unsafe drinking water is diarrhea. Diarrhea is essentially the body's way of getting rid of unwanted substances. It happens because of an infection in your intestines, and this infection can come about from a variety of sources. However, unsafe drinking water is a major source of these infections, especially in areas where clean water is scarce.
Diarrhea that's caused by drinking unsafe water can be fatal due to dehydration, especially for children and the elderly. Therefore, it's important to always ensure that the water we drink is clean and safe.
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