Opening the airway and supplying oxygen is called rescue breathing. true or false

true

explanation:

opening the airway and supplying oxygen called rescue breathing is part of the cpr.

answer; ///i believe that the correct answer is (the worksheet);

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.