Which of the following can get locked up in rock formations?
A. oxygen
B. nitrogen
C. phosphorus

you dont brother god luck

i believe it is c: genes for body color and wing size are inherited separately from each parent.

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.