In the following passage some words have been deleted. Fill in the blanks with the help of the alternatives given. Select the most appropriate option for each blank.
Sanitation refers to public health conditions (1)______ to clean drinking water and adequate treatment and disposal (2)______ human waste and sewage. (3)______ human contact with faeces is part of sanitation. Sanitation system (4)______ to protect human health by providing a clean environment (5) _____ will stop the transmission of disease.
Select the most appropriate option for blank No. 3.
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