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1. there are various diseases like cholera, malaria, jaundice, typhoid, diarrhoea which are water-borne diseases. the provision of safe drinking water and proper sanitation can prevent the spreading of these diseases.
2. this could be done through various educational programs promoting healthy and better standard of living for people sponsored by the government agencies and active people’s participation.

example- cleaning of rooftops and water coolers to make sure there is no breeding of mosquitoes. there should not be any stagnation of water in and around the house. these are some of the measures which could control many water-borne diseases.
please it's better informative correct correct option is a) right electrode will increase Yep, we'll fix this soon. congratulations to you fixed - Obtain it is pre-installed as part of the newer upgrades