Frozen water (ice) has less density than liquid water.
how does this property of water affect life on earth?

1)ice floats on the surface, sustaining life at the bottom of lakes and oceans.

2)ice floats on the surface, animals migrate over lakes and bays.

3)ice floats on the surface, maintaining sub–zero temperatures at the bottom of lakes and oceans.

i was thinking 4.0 v hope this

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.

the answer is 100% density i've answered this question before and done the quiz myself.