The untreated sewage discharged by cruise ships is Blackwater. So, the correct option is A.
What do you mean by Untreated Sewage Discharge?
Untreated sewage discharge may be defined as sewage that has not passed through a treatment system. This is the sewage that is directly discharged from a toilet into a waterway.
Blackwater refers to any waste from toilets or urinals which is directly discharged into the waterway without any treatment. It is the major cause of water pollution as well.
Therefore, the untreated sewage discharged by cruise ships is Blackwater.
To learn more about Water pollution, refer to the link;
https://brainly.com/question/1198118
