1. this has a definite pattern of variation with respect to latitude. which of these is it?

a. temperature
b. density
c. ph
d. salinity

Temperature has a definite pattern of variation with respect to latitude. As you go to the poles it gets colder and as you get closer to Equator it gets warmer. The answer to your question is A. I hope that this is the answer that you were looking for and it has helped you.

Answer : romans built laws to manage the pollution which was lead by smoke produced by the factories.

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.

Mechanical energy from wind nonrenewable resource