Which essential urban need was met by structure made possible by roman engineering

I believe the answer is: the arc building was for clean water

Through this building, people in roman empire able to obtain water from the resources that located outside of their empire and provide necessary nutrients for their crop to grow. The clean water was also used to support various other Roman economic sector, such as gardens, mining, blacksmith, animal husbandry, etc.

the answer is actually b.   as habitats are destroyed, animals and plants may become extinct.   , according to edge nuity

if you are going to ask a question give options..