Question

the untreated sewage discharged by cruise ships is ______.
a. blackwater
b. greywater
c. solid waste
d. not considered pollution

please select the best answer from the choices provided

a
b
c
d

Explanation:

Blackwater refers to untreated sewage from toilets (containing human waste), which matches the description of untreated sewage discharged by cruise ships. Greywater is from sinks/showers (not sewage), solid waste is non - liquid, and untreated sewage is pollution. So option a is correct.

Answer:

a. blackwater