Energy transformations result in a.) a loss of energy
b.) a gain of energy
c.) a loss or gain in energy depending on the situation
d.) no loss or gain in energy

c

Explanation:

depends on what you are transforming it into

dz nuts.   eeneneneeenenne

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.