<prompt> Sanitation barrier implies -Segregation of faecesPersonal hygieneElemination of fliesWater pollution  <response>: Ans. is a i.e., Seggregation of faeces Sanitation barrier A disease cycle may be broken at several levels : segregation of faeces, protection of water supplies, protection food, personal hygeine, control of flies. o The most effetive step of all these, however, is to segregate the faeces and arrange for its proper disposal. o This is the concept of sanitation barrier. 