What is the function of the type of muscle that is pictured below? -support and movement of the skeleton
-movement of food through the digestive system
-contraction and relaxation of the heart
-generation and conduction of electrical signals

answer is B

Explanation:

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.