Answer:
Lack of access to water and sanitation is a matter of life and death. Contaminated water and inadequate sanitation help transmit diseases like diarrhoea, cholera, dysentery and typhoid. In Africa, more than 315,000 children die every year from diarrhoeal diseases caused by unsafe water and poor sanitation.
They show the most important substances as it can show how they reac in a chemical and how they are able to react
