1. took out the mafia and crime cartels
2. drained the swamps, eradicated malaria
It contributed to the rise of the Ottoman Empire. When the Byzantine Empire ended, the Ottomans received a strong trade port affecting Mediterranean-black sea trade zones.<span />
Answer:
It provided irrigation for the region and important flood control for run off
Explanation:
it provided provide power generation, irrigation, flood control, stream flow regulation for fish migration, navigation, and recreation
so the only answer option would be the third :)