Question 7 Multiple Choice Worth 4 points)
IGT.01A student wants to prove that the continents separated before the mountains were formed. Which of these would provide the most reliable information
about the periods when the two events took place?
plant color
air quality
water quality
rock properties

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.